Cheat sheet policy at your school?

[Stephan Hoyer]

Like I said, maybe for physics 1, or 2. After that, nope. There are no more 'simple derivations'.

Maybe you don't have simple derivations, but to take upper level electrodynamics and mechanics courses, for example (what I'm doing this semester), it's not hard to recall Maxwell's Equations or the Euler-Lagrange Equation if you've worked at least a minimum of problems.

Take a look at the back of Griffiths, for example. Most of what you need to solve an electrodynamics problem is right there, and those equations are all pretty basic.

I won't foolishly say there is no need for references on exams, since sometimes there is absolutely that need, but to claim that there are not "simple derivations" in advanced physics is misleading. There may not be simple derivations, but there are still simple results that should not be too hard to recall.