Pete: I was just thinking the same thing, that we ought to start a wiki to do this project. Questions do come up though like "where ought one draw the line between the simple and nonsimple"? This question relates even ti billswift's comment about the name.

For instance, in physics, ought we include Hamilton's equations/the hamiltonian? There's certainly understanding to be found by considering a system in those terms. But deriving those and so on probably is a bit deeper than what one might want to consider "easy math"... or maybe not. Those are in some ways the starting point that leads to the deep stuff.

There's probably analogous questions in other fields. So we have to decide what we're going to consider the "easy" math.