Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.
If I have a maths question, on which site should I ask: MathOverflow or Mathematics.SE?
MathOverflow is a question and answer site for mathematicians. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about research level mathematics.
research level mathematics
It depends on the question.
MathOverflow is for research level questions.
Mathematics.SE is for any level.