#Titel Jokes & Stories / Englisch / MathJokes #Logo gadget16b:Pinsel/AG.J&S #Font Losse 16 #C31 Math Jokes #Font topaz 8 #C21 Words in {} should be interepreted as greek letters: Q: I M A {pi}{rho}Maniac. R U 1,2? o <- read as "U-not" A: Y ? o ("I am a pyromaniac. Are you not one, too?" "Why not?") F U \{can\} \{read\} Ths U \{Mst\} \{use\} TeX ("If you can read this, you must use TeX") -- 97.3% of all statistics are made up. ---------------------------------------------------------------------------- There was an Indian Chief, and he had three squaws, and kept them in three teepees. When he would come home late from hunting, he would not know which teepee contained which squaw, being dark and all. He went hunting one day, and killed a hippopotamus, a bear, and a buffalo. He put the a hide from each animal into a different teepee, so that when he came home late, he could feel inside the teepee and he would know which squaw was inside. Well after about a year, all three squaws had children. The squaw on the bear had a baby boy, the squaw on the buffalo hide had a baby girl. But the squaw on the hippopotamus had a girl and a boy. So what is the moral of the story? *********************** The squaw on the hippopotamus is equal to the sum of the squaws on the other two hides. ---------------------------------------------------------------------------- -Did you hear the one about the statistician? -Probably.... ------------------------------------------------------------------------- There was once a very smart horse. Anything that was shown it, it mastered easily, until one day, its teachers tried to teach it about rectanguar coordinates and it couldn't understand them. All the horse's aquaintences and friends tried to figure out what was the matter and couldn't. Then a new guy (what the heck, a computer engineer) looked at the problem and said, "Of course he can't do it. Why, you're putting Descartes before the horse!" ----------------------------------------------------------------------- "What do you get when you cross an elephant with a banana? Elephant banana sine theta in a direction mutually perpendicular to the two as determined by the right hand rule." --------- TOP TEN EXCUSES FOR NOT DOING THE MATH HOMEWORK 1. I accidentally divided by zero and my paper burst into flames. 2. Isaac Newton's birthday. 3. I could only get arbitrarily close to my textbook. I couldn't actually reach it. 4. I have the proof, but there isn't room to write it in this margin. 5. I was watching the World Series and got tied up trying to prove that it converged. 6. I have a solar powered calculator and it was cloudy. 7. I locked the paper in my trunk but a four-dimensional dog got in and ate it. 8. I couldn't figure out whether i am the square of negative one or i is the square root of negative one. 9. I took time out to snack a doughnut and a cup of coffee. I spent the rest of the night trying to figure which one to dunk. 10. I could have sworn I put the homework inside a Klein bottle, but this morning I couldn't find it. A Physicist and a mathematician setting in a faculty lounge. Suddenly, the coffee machine catches on fire. The physicist grabs a bucket and leap towards the sink, filled the bucket with water and puts out the fire. Second day, the same two sit in the same lounge. Again, the coffee machine catches on fire. This time, the mathematician stands up, got a bucket, hand the bucket to the physicist, thus reduce the problem to a previousely solved one. An engineer, a mathematician, and a physicist are staying in three adjoining cabins at a decrepit old motel. First the engineer's coffee maker catches fire on the bathroom vanity. He smells the smoke, wakes up, unplugs it, throws it out the window, and goes back to sleep. Later that night the physicist smells smoke too. He wakes up and sees that a cigarette butt has set the trash can on fire. He says to himself, "Hmm. How does one put out a fire? One can reduce the temperature of the fuel below the flash point, isolate the burning material from oxygen, or both. This could be accomplished by applying water." So he picks up the trash can, puts it in the shower stall, turns on the water, and, when the fire is out, goes back to sleep. The mathematician, of course, has been watching all this out the window. So later, when he finds that his pipe ashes have set the bedsheet on fire, he is not in the least taken aback. He immediately sees that the problem reduces to one that has already been solved and goes back to sleep. So a mathematician, an engineer, and a physicist are out hunting together. They spy a deer in the woods. The physicist calculates the velocity of the deer* and the effect of gravity on the bullet, aims his rifle and fires. Alas, he misses; the bullet passes three feet behind the deer. The deer bolts some yards, but comes to a halt, still within sight of the trio. "Shame you missed," comments the engineer, "but of course with an ordinary gun, one would expect that." He then levels his special deer-hunting gun, which he rigged together from an ordinary rifle, a sextant, a compass, a barometer, and a bunch of flashing lights which don't do anything but impress onlookers, and fires. Alas, his bullet passes three feet in front of the deer, who by this time wises up and vanishes for good. "Well," says the physicist, "your contraption didn't get it either." "What do you mean?" pipes up the mathematician. "Between the two of you, that was a perfect shot!" #C10 ------------------------------- *How they knew it was a deer: The physicist observed that it behaved in a deer-like manner, so it must be a deer. The mathematician asked the physicist what it was, thereby reducing it to a previously solved problem. The engineer was in the woods to hunt deer, therefore it was a deer. #C21 A mathematician and a physicist were asked the following question: Suppose you walked by a burning house and saw a hydrant and a hose not connected to the hydrant. What would you do? P: I would attach the hose to the hydrant, turn on the water, and put out the fire. M: I would attach the hose to the hydrant, turn on the water, and put out the fire. Then they were asked this question: Suppose you walked by a house and saw a hose connected to a hydrant. What would you do? P: I would keep walking, as there is no problem to solve. M: I would disconnect the hose from the hydrant and set the house on fire, reducing the problem to a previously solved form. A mathematician, a physicist and an engineer are given an identical problem: Prove that all odd numbers greater than 2 are prime numbers. They proceed: Mathematician: 3 is a prime, 5 is a prime, 7 is a prime, 9 is not a prime - counterexample - claim is false. Physicist: 3 is a prime, 5 is a prime, 7 is a prime, 9 is an experimental error, 11 is a prime, ... Engineer: 3 is a prime, 5 is a prime, 7 is a prime, 9 is a prime, 11 is a prime, ... A mathematician, a physicist, and an engineer were travelling through Scotland when they saw a black sheep through the window of the train. "Aha," says the engineer, "I see that Scottish sheep are black." "Hmm," says the physicist, "You mean that some Scottish sheep are black." "No," says the mathematician, "All we know is that there is at least one sheep in Scotland, and that at least one side of that one sheep is black!" A Mathemetician (M) and an Engineer (E) attend a lecture by a Physicist. The topic concerns Kulza-Klein theories involving physical processes that occur in spaces with dimensions of 9, 12 and even higher. The M is sitting, clearly enjoying the lecture, while the E is frowning and looking generally confused and puzzled. By the end the E has a terrible headache. At the end, the M comments about the wonderful lecture. The E says "How do you understand this stuff?" M: "I just visualize the process" E: "How can you POSSIBLY visualize something that occurs in 9-dimensional space?" M: "Easy, first visualize it in N-dimensional space, then let N go to 9" ======================================================================== There were once three acedimians, an engineer, a physicist, and a mathematician visiting a small town for a conference. They found themselves forced to share a room in one of the most dirty, dingy, and really low quality hotels that they had ever seen. The room that they had was on the third floor, and the nearest working bathroom was on the fourth. Late that night, the engineer awoke, and decided to avail himself of the lavatory facilities. Going up the stairs, he smelled smoke, and indeed, at the end of the hall he saw a fire. Finding a hose on the wall, he turned it on, ran down the hall, and extinguished the fire. He then visited the bathroom, and returned to bed. An hour later, the physicist awoke, and felt the call of nature. As he went upstairs, he smelled smoke, and found that there was a fire. Finding the hose, he whipped out his calculator, figured out the amount of water needed to extinguish a fire of that size, calculated the flow rate of the hose, turned it on for exactly 15.24 minutes, and extinguished the fire. He then used the bathroom, and returned to bed. Later still, the mathematician awoke and decided that he needed to use the bathroom. Going upstairs, he too found the olbligatory smoke and fire. Looking around in a panic, he found the fire hose. He then said, "Aha! A solution exists!" And after using the bathroom, he returned to bed. ======================================================================== 1)physicist and mathematician are given a task: to boil some water in a tea pot. They are both given empty tea pot. So they both fill it up with water and then put it on a stove and boil it. Now the problem becomes more complicated: The tea pot filled with water is standing on the stove. The task is the same. PHYSICIST: turns on a fire and heats the water. MATHEMATICIAN: Pours out the water and the problem is reduced to the previous one. 2) (a little stupid) The guy gets on a bus and starts threatenning everybody: "I'll integrate you! I'll differentiate you!!!" So everybody gets scared and runs away. Only one person stays. The guy comes up to him and says:"Aren't you scared, I'll integrate you, I'll differentiate you!!!" And the other guy says; "No, I am not scared, I am e^x" ( 1 ) ----- = log cabin cabin ^ Integral sign... -------------------- 8 5 If lim - = oo (infinity), then what does lim - = ? x->0 x x->0 x answer: (write 5 on it's side) --------------------- Why did the cat fall off the roof? Because he lost his mu. (mew=sound cats make, mu=coeff of friction) --------------------- Q: What do you call a teapot of boiling water on top of mount everest? A: A HIGH-POT-IN-USE Q: What do you call a broken record? A: A Decca-gone -- What follows is a "quiz" a student of mine once showed me (which she'd gotten from a previous teacher, etc...) It's multiple choice, and if you sort this letter (with upper and lower case disjoint, ie on an ASCII machine) questions and answers will come out next to each other. Enjoy... S. What the acorn said when he grew up N. bisects u. A dead parrot g. center F. What you should do when it rains R. hypotenuse m. A guy who has been to the beach H. coincide h. The set of cards is missing y. polygon A. The boy has a speech defect t. secant K. How they schedule gym class p. tangent b. What he did when his mother-in-law wanted to go home D. ellipse O. The tall kettle boiling on the stove W. geometry r. Why the girl doesn't run a 4-minute mile j. decagon When considering the behaviour of a howitzer: A mathematician will be able to calculate where the shell will land A physicist will be able to explain how the shell gets there An engineer will stand there and try to catch it A group of Polish tourists is flying on a small airplane through the Grand Canyon on a sightseeing tour. The tour guide anounces: "On the right of the airplane, you can see the famous Bright Angle Falls." The tourists leap out of their seats and crowd to the windows on the right side. This causes a dynamic imbalance, and the plane violently rolls to the side and crashes into the canyon wall. All aboard are lost. The moral to this episode is: always keep your poles off the right side of the plane. Caveat: While this joke mentions Polish people, it is not, in my opinion, in the catagory of the infamous Polish jokes. I hope no one is offended but only humored. Mrs. Johnson the elementary school math teacher was having children do problems on the blackboard that day. ``Who would like to do the first problem, addition?'' No one raised their hand. She called on Tommy, and with some help he finally got it right. ``Who would like to do the second problem, subtraction?'' Students hid their faces. She called on Mark, who got the problem but there was some suspicion his girlfriend Lisa whispered it to him. ``Who would like to do the third problem, division?'' Now a low collective groan could be heard as everyone looked at nothing in particular. The teacher called on Suzy, who got it right (she has been known to hold back sometimes in front of her friends). ``Who would like to do the last problem, multiplication?'' Tim's hand shot up, surprising everyone in the room. Mrs. Johnson finally gained her composure in the stunned silence. ``Why the enthusiasm, Tim?'' ``God said to go fourth and multiply!'' ============================================================================== A mathematician and a physicist agree to a psychological experiment. The mathematician is put in a chair in a large empty room and a beautiful naked woman is placed on a bed at the other end of the room. The psychologist explains, "You are to remain in your chair. Every five minutes, I will move your chair to a position halfway between its current location and the woman on the bed." The mathematician looks at the psychologist in disgust. "What? I'm not going to go through this. You know I'll never reach the bed!" And he gets up and storms out. The psychologist makes a note on his clipboard and ushers the physicist in. He explains the situation, and the physicist's eyes light up and he starts drooling. The psychologist is a bit confused. "Don't you realize that you'll never reach her?" The physicist smiles and replied, "Of course! But I'll get close enough for all practical purposes!" --- Engineer, physicist and mathematican are asked to find the value of 2+2. Engineer (after 3 minutes, with a slide rule): "The answer is precisely 3.9974." Physicist (after 6 hours of experiments): "The value is approximately 4.002, with an error of plus-or-minus 0.005." Mathematician (after a week of calculation): "Well, I haven't found an answer yet but I CAN prove that an answer exists." --- Dean, to the physics department. "Why do I always have to give you guys so much money, for laboratories and expensive equipment and stuff. Why couldn't you be like the math department - all they need is money for pencils, paper and waste-paper baskets. Or even better, like the philosophy department. All they need are pencils and paper." --- Engineer, physicist and mathematican are all challenged with a problem: to fry an egg when there is a fire in the house. The engineer just grabs a huge bucket of water and runs over to the fire, putting it out. The physicist thinks for a long while, and then measures a precise amount of water into a container. He takes it over to the fire, pours it on and with the last drop the fire goes out. The mathematican pores over pencil and paper. After a few minutes he goes "Aha! A solution exists!" and goes back to frying the egg. Sequel: This time they are asked simply to fry an egg (no fire). The engineer just does it, kludging along; the physicist calculates carefully and produces a carefully cooked egg; and the mathematican lights a fire in the corner, and says "I have reduced it to the previous problem." --- Mummy snake to baby snakes: "Well, you're old enough now to survive in the real world. So here are the facts of life. Go forth and multiply." Little snakes: "But we can't, we're adders." Mummy snake: "You can do it in logs." --- Q: What's yellow and equivalent to the Axiom of Choice. A: Zorn's Lemon. --- Q: What do you get if you cross an elephant with a zebra. A: Elephant zebra sin theta. Q: What do you get if you cross an elephant with a mountain climber. A: You can't do that. A mountain climber is a scalar. --- Q: To what question is the answer "9W." A: "Dr. Wiener, do you spell your name with a V?" ============================================================================== A somewhat advanced society has figured how to package basic knowledge in pill form. A student, needing some learning, goes to the pharmacy and asks what kind of knowledge pills are available. The pharmacist says "Here's a pill for English literature." The student takes the pill and swallows it and has new knowledge about English literature! "What else do you have?" asks the student. "Well, I have pills for art history, biology, and world history," replies the pharmacist. The student asks for these, and swallows them and has new knowledge about those subjects. Then the student asks, "Do you have a pill for math?" The pharmacist says "Wait just a moment", and goes back into the storeroom and brings back a whopper of a pill and plunks it on the counter. "I have to take that huge pill for math?" inquires the student. The pharmacist replied "Well, you know math always was a little hard to swallow." ============================================================================== Q:What did the acorne say when it grew up? A:Geomtry ============================================================================== Q. What does a mathematician do when he's constipated? A. He works it out with a pencil. ------------------------------------------------------------------------ "A mathematician is a device for turning coffee into theorems" -- P. Erdos ------------------------------------------------------------------------- Three standard Peter Lax jokes (heard in his lectures) : 1. What's the contour integral around Western Europe? Answer: Zero, because all the Poles are in Eastern Europe! Addendum: Actually, there ARE some Poles in Western Europe, but they are removable! 2. An English mathematician (I forgot who) was asked by his very religious colleague: Do you believe in one God? Answer: Yes, up to isomorphism! 3. What is a compact city? It's a city that can be guarded by finitely many near-sighted policemen! ------------------------------------------------------------------------- Q: What's purple and commutes? A: An abelian grape. Q: What's yellow, and equivalent to the Axiom of Choice? A: Zorn's Lemon. ------------------------------------------------------------------------- Q: Why did the mathematician name his dog "Cauchy"? A: Because he left a residue at every pole. Q: Why is it that the more accuracy you demand from an interpolation function, the more expensive it becomes to compute? A: That's the Law of Spline Demand. ------------------------------------------------------------------------- "Algebraic symbols are used when you do not know what you are talking about." ------------------------------------------------------------------------- Moebius always does it on the same side. Heisenberg might have slept here. ------------------------------------------------------------------------- There was a mad scientist ( a mad ...social... scientist ) who kidnapped three colleagues, an engineer, a physicist, and a mathematician, and locked each of them in seperate cells with plenty of canned food and water but no can opener. A month later, returning, the mad scientist went to the engineer's cell and found it long empty. The engineer had constructed a can opener from pocket trash, used aluminum shavings and dried sugar to make an explosive, and escaped. The physicist had worked out the angle necessary to knock the lids off the tin cans by throwing them against the wall. She was developing a good pitching arm and a new quantum theory. The mathematician had stacked the unopened cans into a surprising solution to the kissing problem; his dessicated corpse was propped calmly against a wall, and this was inscribed on the floor in blood: Theorem: If I can't open these cans, I'll die. Proof: assume the opposite... ---------------------------------------------------------------------------- Here's a limerick I picked up off the net a few years back - looks better on paper. \/3 / | 2 3 x 3.14 3_ | z dz x cos( ----------) = ln (\/e ) | 9 / 1 Which, of course, translates to: Integral z-squared dz from 1 to the square root of 3 times the cosine of three pi over 9 equals log of the cube root of 'e'. And it's correct, too. -------------------------------------------------------------------------- Three men are in a hot-air balloon. Soon, they find themselves lost in a canyon somewhere. One of the three men says, "I've got an idea. We can call for help in this canyon and the echo will carry our voices far." So he leans over the basket and yells out, "Helllloooooo! Where are we?" (They hear the echo several times). 15 minutes later, they hear this echoing voice: "Helllloooooo! You're lost!!" One of the men says, "That must have been a mathematician." Puzzled, one of the other men asks, "Why do you say that?" The reply: "For three reasons. (1) he took a long time to answer, (2) he was absolutely correct, and (3) his answer was absolutely useless." (I'm not sure if the following one is a true story or not) The great logician Betrand Russell (or was it A.N. Whitehead?) once claimed that he could prove anything if given that 1+1=1. So one day, some smarty-pants asked him, "Ok. Prove that you're the Pope." He thought for a while and proclaimed, "I am one. The Pope is one. Therefore, the Pope and I are one." ----------------------------------------------------------------------------- THE STORY OF BABEL: In the beginning there was only one kind of Mathematician, created by the Great Mathamatical Spirit form the Book: the Topologist. And they grew to large numbers and prospered. One day they looked up in the heavens and desired to reach up as far as the eye could see. So they set out in building a Mathematical edifice that was to reach up as far as "up" went. Further and further up they went ... until one night the edifice collapsed under the weight of paradox. The following morning saw only rubble where there once was a huge structure reaching to the heavens. One by one, the Mathematicians climbed out from under the rubble. It was a miracle that nobody was killed; but when they began to speak to one another, SUPRISE of all suprises! they could not understand each other. They all spoke different languages. They all fought amongst themselves and each went about their own way. To this day the Topologists remain the original Mathematicians. - adapted from an American Indian legend of the Mound Of Babel ------------------------------------------------------------------------------- The ark lands after The Flood. Noah lets all the animals out. Says, "Go and multiply." Several months pass. Noah decides to check up on the animals. All are doing fine except a pair of snakes. "What's the problem?" says Noah. "Cut down some trees and let us live there", say the snakes. Noah follows their advice. Several more weeks pass. Noah checks on the snakes again. Lots of little snakes, everybody is happy. Noah asks, "Want to tell me how the trees helped?" "Certainly", say the snakes. "We're adders, and we need logs to multiply." ------------------------------------------------------------------------------- What is "pi"? Mathematician: Pi is the number expressing the relationship between the circumference of a circle and its diameter. Physicist: Pi is 3.1415927plus or minus 0.000000005 Engineer: Pi is about 3. ------------------------------------------------------------------------------- Lemma: All horses are the same color. Proof (by induction): Case n=1: In a set with only one horse, it is obvious that all horses in that set are the same color. Case n=k: Suppose you have a set of k+1 horses. Pull one of these horses out of the set, so that you have k horses. Suppose that all of these horses are the same color. Now put back the horse that you took out, and pull out a different one. Suppose that all of the k horses now in the set are the same color. Then the set of k+1 horses are all the same color. We have k true => k+1 true; therefore all horses are the same color. Theorem: All horses have an infinite number of legs. Proof (by intimidation): Everyone would agree that all horses have an even number of legs. It is also well-known that horses have forelegs in front and two legs in back. 4 + 2 = 6 legs, which is certainly an odd number of legs for a horse to have! Now the only number that is both even and odd is infinity; therefore all horses have an infinite number of legs. However, suppose that there is a horse somewhere that does not have an infinite number of legs. Well, that would be a horse of a different color; and by the Lemma, it doesn't exist. QED ------------------------------------------------------------------------------ Ya' hear about the geometer who went to the beach to catch the rays and became a tangent ? ------------ My geometry teacher was sometimes acute, and sometimes obtuse, but always, he was right. ------------ And now, for some really bad picture jokes (that I heard at Cal Poly SLO) : Q: What's the title of this picture ? .. .. ____ .. .. \\===/======\\== || | | || || |____| || || ( ) || || \____/ || || || || || || || || || || || || || || || || || || || || (\ || || ) ) || || //||\\ || A: Hypotenuse ------- Q: What quantity is represented by this ? /\ /\ /\ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ /______\ /______\ /______\ || || || || || || A: 9, tree + tree + tree Q: A dust storm blows through, now how much do you have ? A: 99, dirty tree + dirty tree + dirty tree Q: Some birds go flying by and leave their droppings, one per tree, how many is that ? A: 100, dirty tree and a turd + dirty tree and a turd + dirty tree and a turd ------------------------------------------------------------------------------- A biologist, a statistician, a mathematician and a computer scientist are on a photo-safari in africa. They drive out on the savannah in their jeep, stop and scout the horizon with their binoculars. The biologist : "Look! There's a herd of zebras! And there, in the middle : A white zebra! It's fantastic ! There are white zebra's ! We'll be famous !" The statistician : "It's not significant. We only know there's one white zebra." The mathematician : "Actually, we only know there exists a zebra, which is white on one side." The computer scientist : "Oh, no! A special case!" --------------------------------------------------------------------------- I saw the following scrawled on a math office blackboard in college: 1 + 1 = 3, for large values of 1 --------------------------------------------------------------------------- lim ---- 8-->9 \/ 8 = 3 --------------------------------------------------------------------------- lim 3 = 8 w->oo (It is more obvious when handwritten...) ------------------------------------------------------------------------------- Asked how his pet parrot died, the mathmatican answered "Polynomial. polygon." --- Lumberjacks make good musicians because of their natural logarithms. --- Pie are not square. Pie are round. Cornbread are square. --- "The integral of e to the x is equal to f of the quantity u to the n." / x n | e = f(u ) / --- A physics joke: "Energy equals milk chocolate square" ------------------------------------------------------------------------------ Russell to Whitehead: "My Godel is killing me!" ------------------------------------------------------------------------------ A doctor, a lawyer and a mathematician were discussing the relative merits of having a wife or a mistress. The lawyer says: "For sure a mistress is better. If you have a wife and want a divorce, it causes all sorts of legal problems. The doctor says: "It's better to have a wife because the sense of security lowers your stress and is good for your health. The mathematician says: " You're both wrong. It's best to have both so that when the wife thinks you're with the mistress and the mistress thinks you're with your wife --- you can do some mathematics. ------------------------------------------------------------------------------ Statisticians probably do it Algebraists do it in groups. ----------------------------------------------------------------------------- Von Neumann and Nobert Weiner were both the subject of many dotty professor stories. Von Neumann supposedly had the habit of simply writing answers to homework assignments on the board (the method of solution being, of course, obvious) when he was asked how to solve problems. One time one of his students tried to get more helpful information by asking if there was another way to solve the problem. Von Neumann looked blank for a moment, thought, and then answered, "Yes.". Weiner was in fact very absent minded. The following story is told about him: When they moved from Cambridge to Newton his wife, knowing that he would be absolutely useless on the move, packed him off to MIT while she directed the move. Since she was certain that he would forget that they had moved and where they had moved to, she wrote down the new address on a piece of paper, and gave it to him. Naturally, in the course of the day, an insight occurred to him. He reached in his pocket, found a piece of paper on which he furiously scribbled some notes, thought it over, decided there was a fallacy in his idea, and threw the piece of paper away. At the end of the day he went home (to the old address in Cambridge, of course). When he got there he realized that they had moved, that he had no idea where they had moved to, and that the piece of paper with the address was long gone. Fortunately inspiration struck. There was a young girl on the street and he conceived the idea of asking her where he had moved to, saying, "Excuse me, perhaps you know me. I'm Norbert Weiner and we've just moved. Would you know where we've moved to?" To which the young girl replied, "Yes daddy, mommy thought you would forget." The capper to the story is that I asked his daughter (the girl in the story) about the truth of the story, many years later. She said that it wasn't quite true -- that he never forgot who his children were! The rest of it, however, was pretty close to what actually happened... ----------------------------------------------------------------------------- C programmers do it with long pointers. (Logicians do it) or [not (logicians do it)]. ----------------------------------------------------------------------------- Theorem: a cat has nine tails. Proof: No cat has eight tails. A cat has one tail more than no cat. Therefore, a cat has nine tails. ----------------------------------------------------------------------------- The USDA once wanted to make cows produce milk faster, to improve the dairy industry. So, they decided to consult the foremost biologists and recombinant DNA technicians to build them a better cow. They assembled this team of great scientists, and gave them unlimited funding. They requested rare chemicals, weird bacteria, tons of quarantine equipment, there was a God-awful typhus epidemic they started by accident, and, 2 years later, they came back with the "new, improved cow." It had a milk production improvement of 2% over the original. They then tried with the greatest Nobel Prize winning chemists around. They worked for six months, and, after requisitioning tons of chemical equipment, and poisoning half the small town in Colorado where they were working with a toxic cloud from one of their experiments, they got a 5% improvement in milk output. The physicists tried for a year, and, after ten thousand cows were subjected to radiation therapy, they got a 1% improvement in output. Finally, in desperation, they turned to the mathematicians. The foremost mathematician of his time offered to help them with the problem. Upon hearing the problem, he told the delegation that they could come back in the morning and he would have solved the problem. In the morning, they came back, and he handed them a piece of paper with the computations for the new, 300% improved milk cow. The plans began: "A Proof of the Attainability of Increased Milk Output from Bovines: Consider a spherical cow......" -------------------------------------------------------------------------- Theorem : All positive integers are equal. Proof : Sufficient to show that for any two positive integers, A and B, A = B. Further, it is sufficient to show that for all N > 0, if A and B (positive integers) satisfy (MAX(A, B) = N) then A = B. Proceed by induction. If N = 1, then A and B, being positive integers, must both be 1. So A = B. Assume that the theorem is true for some value k. Take A and B with MAX(A, B) = k+1. Then MAX((A-1), (B-1)) = k. And hence (A-1) = (B-1). Consequently, A = B. -------------------------------------------------------------------------- A bunch of Polish scientists decided to flee their repressive government by hijacking an airliner and forcing the pilot to fly them to a western country. They drove to the airport, forced their way on board a large passenger jet, and found there was no pilot on board. Terrified, they listened as the sirens got louder. Finally, one of the scientists suggested that since he was an experimentalist, he would try to fly the aircraft. He sat down at the controls and tried to figure them out. The sirens got louder and louder. Armed men surrounded the jet. The would be pilot's friends cried out, "Please, please take off now!!! Hurry!!!!!!" The experimentalist calmly replied, "Have patience. I'm just a simple pole in a complex plane." -------------------------------------------------------------------------- Old mathematicians never die; they just lose some of their functions. ------------------------------------------------------------------------------ During a class of calculus my lecturer suddenly checked himself and stared intently at the table in front of him for a while. Then he looked up at us and explained that he thought he had brought six piles of papers with him, but "no matter how he counted" there was only five on the table. Then he became silent for a while again and then told the following story: "When I was young in Poland I met the great mathematician Waclaw Sierpinski. He was old already then and rather absent-minded. Once he had to move to a new place for some reason. His wife wife didn't trust him very much, so when they stood down on the street with all their things, she said: - Now, you stand here and watch our ten trunks, while I go and get a taxi. She left and left him there, eyes somewhat glazed and humming absently. Some minutes later she returned, presumably having called for a taxi. Says Mr Sierpinski (possibly with a glint in his eye): - I thought you said there were ten trunks, but I've only counted to nine. - No, they're TEN! - No, count them: 0, 1, 2, ..." -------------------------------------------------------------------------- Philosopher: "Resolution of the continuum hypothesis will have profound implications to all of science." Physicist: "Not quite. Physics is well on its way without those mythical `foundations'. Just give us serviceable mathematics." Computer Scientist: "Who cares? Everything in this Universe seems to be finite anyway. Besides, I'm too busy debugging my Pascal programs." Mathematician: "Forget all that! Just make your formulae as aesthetically pleasing as possible!" ----------------------------------------------------------------------------- Two male mathematiciens are in a bar. The first one says to the second that the average person knows very little about basic mathematics. The second one disagrees, and claims that most people can cope with a reasonable amount of math. The first mathematicien goes off to the washroom, and in his absence the second calls over the waitress. He tells her that in a few minutes, after his friend has returned, he will call her over and ask her a question. All she has to do is answer one third x cubed. She repeats `one thir -- dex cue'? He repeats `one third x cubed'. Her: `one thir dex cuebd'? Yes, that's right, he says. So she agrees, and goes off mumbling to herself, `one thir dex cuebd...'. The first guy returns and the second proposes a bet to prove his point, that most people do know something about basic math. He says he will ask the blonde waitress an integral, and the first laughingly agrees. The second man calls over the waitress and asks `what is the integral of x squared?'. The waitress says `one third x cubed' and while walking away, turns back and says over her shoulder `plus a constant'! ============================================================================== The Method of Inversive Geometry: We place a spherical cage in the desert, enter it, and lock it. We perform an inversion with respect to the cage. The lion is then in the interior of the cage, and we are outside. The Set Theoretic Method: We observe that the desert is a separable space. It therefore contains an enumerable dense set of points, from which can be extracted a sequence having the lion as limit. We then approach the lion stealthily along this sequence, bearing with us suitable equipment. A Topological Method: We observe that a lion has at least the connectivity of the torus. We transport the desert into four-space. It is then possible to carry out such a deformation that the lion can be returned to three-space in a knotted condition. He is then helpless. The Dirac Method: We observe that wild lions are, ipso facto, not observable in the Sahara Desert. Consequently, if there are any lions in the Sahara, they are tame. The capture of a tame lion may be left as an exercise for the reader. The Thermodynamical Method: We construct a semi-permeable membrane, permeable to everything except lions, and sweep it across the desert. The Schrodinger Method: At any given moment there is a positive probability that there is a lion in the cage. Sit down and wait. #Seitenende #C10 ------------------------------------------------------------------------- The responses below mention the following works (a few added): A Random Walk in Science - R.L. Weber and E. Mendoza More Random Walks In Science - R.L. Weber and E. Mendoza In Mathematical Circles (2 volumes) - Howard Eves Mathematical Circles Revisited - Howard Eves Mathematical Circles Squared - Howard Eves Fantasia Mathematica - Clifton Fadiman The Mathematical Magpi - Clifton Fadiman Seven Years of Manifold - Jaworski The Best of the Journal of Irreproducible Results - George H. Scheer Mathematics Made Difficult - Linderholm A Stress-Analysis of a Strapless Evening Gown - Robert Baker The Worm-Runners Digest Knuth's April 1984 CACM article on The Space Complexity of Songs Stolfi and ?? Sigact article on Pessimal Algorithms and Simplexity Analysis ------------------------------------------------------------------------- #Seitenende #C31 MATHEMATICS PURITY TEST Count the number of yes's, subtract from 60, and divide by 0.6. #C10 -------------------------------------------------------------------------------- #C31 The Basics #C21 1) Have you ever been excited about math? 2) Had an exciting dream about math? 3) Made a mathematical calculation? 4) Manipulated the numerator of an equation? 5) Manipulated the denominator of an equation? 6) On your first problem set? 7) Worked on a problem set past 3:00 a.m.? 8) Worked on a problem set all night? 9) Had a hard problem? 10) Worked on a problem continuously for more than 30 minutes? 11) Worked on a problem continuously for more than four hours? 12) Done more than one problem set on the same night (i.e. both started and finished them)? 13) Done more than three problem sets on the same night? 14) Taken a math course for a full year? 15) Taken two different math courses at the same time? 16) Done at least one problem set a week for more than four months? 17) Done at least one problem set a night for more than one month (weekends excluded)? 18) Done a problem set alone? 19) Done a problem set in a group of three or more? 20) Done a problem set in a group of 15 or more? 21) Was it mixed company? 22) Have you ever inadvertently walked in upon people doing a problem set? 23) And joined in afterwards? 24) Have you ever used food doing a problem set? 25) Did you eat it all? 26) Have you ever had a domesticated pet or animal walk over you while you were doing a problem set? 27) Done a problem set in a public place where you might be discovered? 28) Been discovered while doing a problem set? #Seitenende #C31 Kinky Stuff #C21 29) Have you ever applied your math to a hard science? 30) Applied your math to a soft science? 31) Done an integration by parts? 32) Done two integration by parts in a single problem? 33) Bounded the domain and range of your function? 34) Used the domination test for improper integrals? 35) Done Newton's Method? 36) Done the Method of Frobenius? 37) Used the Sandwich Theorem? 38) Used the Mean Value Theorem? 39) Used a Gaussian surface? 40) Used a foreign object on a math problem (eg: calculator)? 41) Used a program to improve your mathematical technique (eg: MACSYMA)? 42) Not used brackets when you should have? 43) Integrated a function over its full period? 44) Done a calculation in three-dimensional space? 45) Done a calculation in n-dimensional space? 46) Done a change of bases? 47) Done a change of bases specifically in order to magnify your vector? 48) Worked through four complete bases in a single night (eg: using the Graham-Schmidt method)? 49) Inserted a number into an equation? 50) Calculated the residue of a pole? 51) Scored perfectly on a math test? 52) Swallowed everything your professor gave you? 53) Used explicit notation in your problem set? 54) Puposefully omitted important steps in your problem set? 55) Padded your own problem set? 56) Been blown away on a test? 57) Blown away your professor on a test? 58) Have you ever multiplied 23 by 3? 59) Have you ever bounded your Bessel function so that the membrane did not shoot to infinity? 69) Have you ever understood the following quote: "The relationship between Z^0 to C_0, B_0, and H_0 is an example of a general principle which we have encountered: the kernel of the adjoint of a linear transformation is both the annihilator space of the image of the transformation and also the dual space of the quotient of the space of which the image is a subspace by the image subspace." (Shlomo & Bamberg's _A "Course" in Mathematics for Students of Physics_) #Seitenende A tribe of Native Americans generally referred to their woman by the animal hide with which they made their blanket. Thus, one woman might be known as Squaw of Buffalo Hide, while another might be known as Squaw of Deer Hide. This tribe had a particularly large and strong woman, with a very unique (for North America anyway) animal hide for her blanket. This woman was known as Squaw of Hippopotamus hide, and she was as large and powerful as the animal from which her blanket was made. Year after year, this woman entered the tribal wrestling tournament, and easily defeated all challengers; male or female. As the men of the tribe admired her strength and power, this made many of the other woman of the tribe extremely jealous, . One year, two of the squaws petitioned the Chief to allow them to enter their sons together as a wrestling tandem in order to wrestle Squaw of the Hippopotamus hide as a team. In this way, they hoped to see that she would no longer be champion wrestler of the tribe. As the luck of the draw would have it, the two sons who were wrestling as a tandem met the squaw in the final and championship round of the wrestling contest. As the match began, it became clear that the squaw had finally met an opponent that was her equal. The two sons wrestled and struggled vigorously and were clearly on an equal footing with the powerful squaw. Their match lasted for hours without a clear victor. Finally the chief intervened and declared that, in the interests of the health and safety of the wrestlers, the match was to be terminated and that he would declare a winner. The chief retired to his teepee and contemplated the great struggle he had witnessed, and found it extremely difficult to decide a winner. While the two young men had clearly outmatched the squaw, he found it difficult to force the squaw to relinquish her tribal championship. After all, it had taken two young men to finally provide her with a decent match. Finally, after much deliberation, the chief came out from his teepee, and announced his decision. He said... "The Squaw of the Hippopotamus hide is equal to the sons of the squaws of the other two hides" ============================================================================== Q. How many mathematicians does it take to screw in a lightbulb? A. One, who gives it to six Californians, thereby reducing it to the earlier riddle. -- from a button I bought at Nancy Lebowitz's table at Boskone ============================================================================== There are three kinds of mathematicians: those who can count and those who cannot. ============================================================================== 1) A topologist is a man who doesn't know the difference between a coffee cup and a doghunt. 2) A statistician can have his head in an oven and his feet in ice, and he will say that on the average he feels fine. ============================================================================== This joke was floating around a few months ago: A guy decided to go to the brain transplant clinic to refreshen his supply of brains. The secretary informed him that they had three kinds of brains available at that time. Doctors' brains were going for $20 per ounce and lawyers' brains were getting $30 per ounce. And then there were mathematicians' brains which were currently fetching $1000 per ounce. "A 1000 dollars an ounce!" he cried. "Why are they so expensive?" --"It takes more mathematicians to get an ounce of brains," she explained. ============================================================================== Here is a joke I heard in Freiburg, Germany at the Mathematics Dept. (from Susanne Press): Q: What do a mathematician and a physiscist [or engineer, or musician , or whatever the profession of the person adressed] have in common? #C10 -- Matthias Krok, H.-Biesenbachstr. 23, 40627 Duesseldorf, +49-211-275686 e-mail: m_krok@tron.gun.de, FIDO: 2:2440/202.111, ## CrossPoint v3.02 ##