[quinn]

Hmm, haven't taken all that much yet..

Most difficult was..by far..Matrix Algebra.

Most interesting was definitely Intro to Differential Equations, except at the University of Washington, there are two versions of this class. There's the Math department one and there's the Applied Math department one. Most people hate the math department diff. eqns. I took the Amath one and it was outstanding..I attribute most of the credit to my professor, Peter Schmid. I think he teaches in France now.