> as soon as equations I can't get That's the point where you should backtrack. Since this is a blog post it may not be kosher copacetic on all the details. B

> as soon as equations I can't get That's the point where you should backtrack. Since this is a blog post it may not be kosher copacetic on all the details. But if you're studying from books and papers all the notation will either be way too well-known (set theory, cartesian products, R^d vector spaces, lp/Lp norms) or explicitly explained. If you're behind or fuzzy on the more basic stuff (what's an equivalence class? What's a Cartesian product?) I recommend the first two chapters in Munkres' book of topology. The book builds pretty far out into uncharted territory, but its recap of the basics is rigorous and superbly explained with copious illuminating prose.