Top 10 math mnemonics If you study undergraduate medicine, mnemonics are almost indispensable - there is so much factual material to learn. I was never given any mnemonics in my time as a maths undegraduate. But Robert Israel just mentioned "iciacids" to help remember the important features when looking at a function plot Function - Main Features? I would certainly have forgotten some of them. So maybe mnemonics are useful for maths too. Maybe also for tricky proofs? Or for areas knee-deep in definitions, like topology? Does anyone know of a source for math mnemonics? Eg a top 10 type website? Or a kind of successor to sci.math FAQs (although I do not remember any mnemonics there)? Or a book?

I remember the equality $$\Gamma(\frac{1}{2}) = \pi^{\frac{1}{2}}$$ by writing $$\Gamma( \frac{1}{2}= \Pi^{\frac{1}{2}} $$ or $$\Gamma(^{\frac{1}{2}}= \Pi^{\frac{1}{2}} $$