questions about mathematicsI have a lot of questions about mathematics in topics like series, optimization and topolgy?

it is obvious that yahoo level isn't for this, what online community can answers these questions easily?
Give it a try.
I wonder, how long have you been scoutinquestions about mathematicsg Y!A for? Every so often, a truly challenging or obscure question arises, and about half the time, it is answered conclusively.

Anyway, if you prefer a more questions about mathematicshardcore mathematics forum, check out mathoverflow.net

EDIT: I know some undergraduate level series and topology, if you want to ask a specific question.