Have a good joke? Share.
I know this is subjective, but the principle "should be of interest to mathematicians" trumps. (I hope.)
Have a good joke? Share.
I know this is subjective, but the principle "should be of interest to mathematicians" trumps. (I hope.)
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Your momma's so fat she's not embeddable in R^3. Oh yeah? Your momma's so fat she contradicts Whitney's theorem.
A topologist is someone who doesn't know the difference between his ass and a hole in the ground but does know the difference between his ass and two holes in the ground.
I went to visit him while he was lying ill at the hospital. I had come in taxi cab number 14 and remarked that it was a rather dull number. "No" he replied, "it is a very interesting number. It's the smallest number expressible as the product of 7 and 2 in two different ways."
Here are a few of my own inventions:
Old Macdonald had a form; ei /\ ei = 0
Save the environment: use continuation passing style!
What shape of pasta takes the least time to eat? Brachistochroni!
You might be a mathematician if you think fog is a composition.
The Yoda embedding, contravariant it is.
How are Goethe's Faust novels like isomorphisms of sets? Dey're de monic epics.
I'm kind of in two minds about this whole Schroedinger's cat thing...
qwhine, n. self-recrimination
recursive: (λ damn. damn (damn)) (λ damn. damn (damn))
Coeschatology: the study of the beginning of times. The coend is ming!
an anecdote about David Hilbert from the wonderful book (for us laymen ;-) Prime Obsession:
Hilbert had a student who one day presented him with a paper purporting to prove the Riemann Hypothesis. Hilbert studied the paper carefully and was really impressed by depth of the argument; but unfortunately he found an error in it which even he could not eliminate. The following year the student died. Hilbert asked the grieving parents if he might be permitted to make a funeral oration. While the student's relatives and friends were weeping beside the grave in the rain, Hilbert came forward. He began by saying what a tragedy it was that such a gifted young man had died before he had had an opportunity to show what he could accomplish. But, he continued, in spite of the fact that this young man's proof of the Riemann Hypothesis contained an error, it was still possible that some day a proof of the famous problem would be obtained along the lines which the deceased had indicated. "In fact," he continued with enthusiasm, standing there in the rain by the dead student's grave, "let us consider a function of a complex variable...."
A British mathematician was giving a talk in Grothendieck's seminar in Paris. He started "Let X be a variety...". This caused some talking among the students sitting in the back, who were asking each other "What's a variety?". J.-P. Serre, sitting in the front row, turns around a bit annoyed and says "Integral scheme of finite type over a field".
I like this one:
A mathematican walks into a bar accompanied by a dog and a cow.
The bartender says, “Hey, no animals are allowed in here!”
The mathematician replies, “These are very special animals.”
“They’re knot theorists.”
The bartender raises his eyebrows and says, “I’ve met a number of knot theorists who I thought were animals, but never an animal that was a knot theorist.”
“Well, I’ll prove it to you. Ask them them anything you like.”
So the bartender asks the dog, “Name a knot invariant.”
“Arf! Arf!” barks the dog.
The bartender scowls and turns to the cow asking, “Name a topological invariant.”
“Mu! Mu!” says the cow.
At this point the bartender turns to the mathematican and says, “Very funny.” With that, he throws the three out of the bar.
Outside, sitting on the curb, the dog turns to the mathematican and asks, “Do you think I should have said the Jones polynomial instead?”
jose's post reminds me of one I heard Michael Hutchings tell during an undergraduate calculus lecture:
$e^x$ was walking down the street one day and met a polynomial running in the opposite direction.
"Wait, why are you running?" asked $e^x$. The polynomial said:
"There's a differential operator over there! It could differentiate me and turn me into zero!" And the polynomial continued running in fright.
"Ha ha," $e^x$ said to himself. "I'm $e^x$! Let them differentiate me as many times as they want, it makes no difference to me!" So $e^x$ walked on and reached the differential operator. He confidently introduced himself: "Hi, I'm $e^x$!" The reply:
"Hi, I'm $\partial/\partial y$!"
Don't remember where I saw this, but as a woman in mathematics, it tickles me no end:
A poet, a priest, and a mathematician are discussing whether it's better to have a wife or a mistress.
The poet argues that it's better to have a mistress because love should be free and spontaneous.
The priest argues that it's better to have a wife because love should be sanctified by God.
The mathematician says, "I think it's better to have both. That way, when each of them thinks you're with the other, you can do some mathematics."
I've always thought that "What's the value of a contour integral around Western Europe?" "Zero. All the Poles are in Eastern Europe." was pretty good, although not laugh-out-loud funny by any means.
Another one I personally like is "What's an anagram of Banach-Tarski?" "Banach-Tarski Banach-Tarski."
It's not really a "joke," (and whether it's "mathematical" is, I suppose, debatable), but Knuth's article on the complexity of songs is pretty great.
Here is the one I heard recently.
Professor: What is a root of $f(z)$ of multiplicity $k$?
Student: It is a number $a$ such that if you plug it into $f$, you get $0$; if you plug it in again, you again get $0$, and so $k$ times. But if you plug it into $f$ for the $k+1$-st time, you do not get $0$.
I have a few that I've heard and liked.
(1) The Mobius strippers always show their backside.
(2) Apparently, a quote of Paul Erdos, but it's funny nonetheless : Another roof, another proof.
(3) An experimental physicist meets a mathematician in a bar and they start talking. The physicict asks, "What kind of math do you do?" to which the mathematician replies, "Knot theory." The physicist says, "Me neither!"
(4) The primary reason Bourbaki stopped writing books was the realization that Lang was one single person.
The path of love is never smooth
But mine's continuous for you
You're the upper bound in the chains of my heart
You're my Axiom of Choice, you know it's true
But lately our relation's not so well-defined
And I just can't function without you
I'll prove my proposition and I'm sure you'll find
We're a finite simple group of order two
I'm losing my identity
I'm getting tensor every day
And without loss of generality
I will assume that you feel the same way
Since every time I see you, you just quotient out
The faithful image that I map into
But when we're one-to-one you'll see what I'm about
'Cause we're a finite simple group of order two
Our equivalence was stable,
A principal love bundle sitting deep inside
But then you drove a wedge between our two-forms
Now everything is so complexified
When we first met, we simply connected
My heart was open but too dense
Our system was already directed
To have a finite limit, in some sense
I'm living in the kernel of a rank-one map
From my domain, its image looks so blue,
'Cause all I see are zeroes, it's a cruel trap
But we're a finite simple group of order two
I'm not the smoothest operator in my class,
But we're a mirror pair, me and you,
So let's apply forgetful functors to the past
And be a finite simple group, a finite simple group,
Let's be a finite simple group of order two
(Oughter: "Why not three?")
I've proved my proposition now, as you can see,
So let's both be associative and free
And by corollary, this shows you and I to be
Purely inseparable. Q.E.D.
My favourite, from Eilenberg's obituary:
When someone once asked Professor Eilenberg if he could eat Chinese food with three chopsticks, he answered, "Of course," according to Professor Morgan. The questioner asked, "How are you going to do it?" and Professor Eilenberg replied, "I'll take the three chopsticks, I'll put one of them aside on the table, and I'll use the other two."
My favorite one-liner:
Why did the mathematician name her dog "Cauchy"? Because he left a residue at every pole.
My favorite anecdote:
An engineer, a physicist, and a mathematician find themselves in an anecdote, indeed an anecdote quite similar to many that you have no doubt already heard. After some observations and rough calculations the engineer realizes the situation and starts laughing. A few minutes later the physicist understands too and chuckles to herself happily, as she now has enough experimental evidence to publish a paper. This leaves the mathematician somewhat perplexed, as she had observed right away that she was the subject of an anecdote and deduced quite rapidly the presence of humor from similar anecdotes, but considers this anecdote to be too trivial a corollary to be significant, let alone funny.
A biologist, a physicist and a mathematician were all drinking coffee and tea and observing a house across the street from them. They notice that two people walk into the house and then an hour later, three people walk out.
Physicist: An experimental error. Our first measurement was incorrect.
Biologist: No, they've obviously reproduced.
Mathematician: No, now when a one person enters the house, it'll be empty again.
There's a mathematician whose non-mathematician friends are constantly ribbing him because his field is just so abstract and seems to have no relevance to the real world. One day, it gets to him, and he resolves to arm himself with some practical applications of research mathematics for the next encounter. He realizes that his own specialty (mathematical logic) is probably too far beyond them to be of any use there, so he goes to the department bulletin board to find an upcoming talk about something practical. Luckily, a talk is scheduled that afternoon on "the theory of gears." "Perfect!" he says. Nothing could be more practical, more down-to-earth. Finally, he'll be able to prove to his friends that mathematics is relevant to the real world. That afternoon, he's so excited that he goes to the talk five minutes early and sits in the first row of seats. Then, at the scheduled time, the speaker stands up and begins: "While the theory of gears with real numbers of teeth is well understood...."
"Why did the chicken cross the Mobius band?"
The question isn't whether good math jokes exist, but whether they can be classified. The example above works because it plays on ones expectation of the "chicken crossing the road" jokes. Another one in the same vein, known as the shortest math joke:
Another one, which I actually heard in class:
"Take a positive integer N. No wait, N is too big; take a positive integer k."
Here is a non-exhaustive classification of math jokes:
A joke can belong to more than one classification. For example, the "Dog and cow knot theorists" has both puns and a twist on expectations.
By the way, I would exclude jokes which are purely made on stereotypes, like the above joke on extrovert mathematician, because I don't find it funny.
I leave with one of my favorite meta-jokes:
"How many members of a certain demographic group does it take to perform a specified task? A finite number: one to perform the task and the remainder to act in a manner stereotypical of the group in question."
Q: What is non-orientable and lives in the ocean?
A: Möbius Dick...
A mathematician organizes a raffle in which the prize is an infinite amount of money paid over an infinite amount of time. Of course, with the promise of such a prize, his tickets sell like hot cake.
When the winning ticket is drawn, and the jubilant winner comes to claim his prize, the mathematician explains the mode of payment: "1 dollar now, 1/2 dollar next week, 1/3 dollar the week after that..."
"The number you have dialed is imaginary. Please, rotate your phone by 90 degrees and try again..."
From a former prof. - http://www.math.ualberta.ca/~runde/jokes.html (no longer available)
If I remember correctly someone told me that this really happened:
A famous mathematician gave a talk (maybe about mathematical physics), after which an as famous physicist sitting in the first row got up, and loudly declared: "That's all nice, but without mathematics, research in physics would be maybe a week behind the state it is now!"
The famous mathematician responded: "Yes, the week god needed to create the world."
An engineer, a physicist and a mathematician are driving through the high country in Scotland. Atop a hill, they see a black sheep.
The engineer says: "All sheep are black!" The physicist says: "No, no, some sheep are black." The mathematician: "At least one sheep is black on at least one side."
Here is a joke I invented (based on a famous one) and had mixed reaction.
A young mathematician comes to present to a famous mathematician his conjecture and ideas. "You are absolutely wrong," the famous mathematician dismissed the young one. Next enters another young mathematician and presents precisely the opposite conjecture. "You are absolutely wrong" replies the famous mathematician. The famous mathematician's wife interferes. "How could you tell both of them that they are wrong," she sais. "They have made completely opposite claims, one of them must be right!" "You are also wrong," replied the famous mathematician.