How Mathematicians do it:
- Algebraists do it in a ring, in fields, in groups.
- Analysts do it continuously and smoothly.
- Combinatorists do it as many ways as they can.
- Complex analysts do it between the sheets.
- Computer scientists do it depth-first.
- Cosmologists do it in the first three minutes.
- Galois theorists do it in a field.
- Geometers do it symmetrically.
- Graph theorists do it in four colors.
- Hilbert spacers do it orthogonally.
- Linear programmers do it with nearest neighbors.
- Logicians do it by choice, consistently and completely.
- (Logicians do it) or [not (logicians do it)].
- Mathematical physicists understand the theory of how to do it, but have difficulty obtaining practical results.
- Pure mathematicians do it rigorously.
- Quantum physicists can either know how fast they do it, or where they do it, but not both.
- Real analysts do it almost everywhere.
- Statisticians probably do it.
- Topologists do it openly, in multiply connected domains
- Cantor did it diagonally.
- Fermat tried to do it in the margin, but couldn’t fit it in.
- Galois did it the night before.
- Mobius always does it on the same side.
- Markov does it in chains.
- Newton did it standing on the shoulders of giants.
- Turing did it but couldn’t decide if he’d finished.
- When Cauchy did it, the distance became less than epsilon.
- Godel did it but incompletely.
http://www.quora.com/Nerd-Humor/What-are-some-good-math-jokes