Corollary: What do you get if you cross a mosquito with a mountain climber?
Nothing, you can’t cross a vector with a scaler
To get to the other… um…
:smack:
What’s yellow and equivalent to the axiom of choice?
Zorn’s Lemon!
I’d heard it as:
You must be sweet as pi, because you make me irrational.
I remember this one from a physics class. The professor drew a picutre of a dead caterpillar on the board. He had Xs for eyes and a tongue hanging out to show that he was dead.
She said it was an erg because it was a dine centimeter.
(as in dyin’)
Not a joke, but a cute geeky ditty: NaCl (SODIUM CHLORIDE) scroll down about halfway
From a “Cheers” episode, at the time in the series that Frasier & Lilith first became parents:
Frasier: How many newborn babies does it take to screw in a lightbulb?
Norm: I dunno. How many?
Frasier: None! Newborn babies don’t have the depth-perception or the hand-eye coordination necessary to perform the task!
Lilith: (chuckling) I must confess that one cracks me up.
A mathematician confided
That a Möbius band is one-sided,
And you’ll get quite a laugh,
If you cut one in half,
For it stays in one piece when divided
<snerk, snort>
Sorry to ask again- could somebody explain this one?
How many Centauris does it take to change a lightbulb? Well in the old days, we would have a thousand servants changing a thousand lightbulbs!
So why won’t Hamiltonian operators live in the suburbs?
Because they can’t commute, of course 
Ah, I love this thread, athough I must admit the martini one went over my head too.
My guess is it’s a Pauli’s Exclusion Principle joke - you can’t have two electrons with the same quantum numbers, meaning that within one orbital the two electrons must have different spins. The parallel situation in the bar is that both electrons in the bar must have different drinks, or else they violate the PEP. :dubious:
Yeah, that’s what I think. While kinda funny, it’s only funny if you assume that both electrons are in the same orbital. If they’re in different orbitals, especially if the orbital energies are degenerate, they can and will be spin-paired so that the total energy is actually lowered slightly. So another version of the joke could be “Two electrons walk into a bar. The first one says 'I’ll have a martini” to which the second replies ‘Dammit, I wanted a beer.’" So, obviously, in this case the electrons best choice is to split a pitcher.
This isn’t so much a geeky joke as just a bad joke. I’ve got a class taught by the department head and right after that is another class in the same room. The head will sometimes say “We’ve gotta get out of here before [the incoming professor] kills me,” as the class has a tendency to try to run late. Anyway, he said it once and I said, “Nah, he won’t dare to kill you. It’s the whole Highlander effect.”