Do You Even Maths?

Reblogging anything that amuses me.

Suppose you have a region best described with spherical coordinates. For example, a sphere.

—Calculus professor (via mathprofessorquotes)

In his short and magnificent 1940 book A Mathematician’s Apology, the English mathematician G.H. Hardy draws attention to the fact that a theorem cannot be undone. Mathematics is the only science that deals with truth, something that can be demonstrated by popping into any library: mathematical literature is evergreen, while texts on other sciences become rapidly obsolete. Two thousand years have not written a wrinkle on the Pythagorean theorem. Nobody studies Ptolemy’s solar system, except out of historical interest, but Euclid is still standing. Mathematics works by accumulation, not substitution.