Questions related to the closely related website, http://math.stackexchange.com
The site https://math.stackexchange.com can be seen as somewhat of a splinter from MathOverflow in which mathematics of all levels, and not just research level, is accepted.
Both sites share a large user base, and are currently hosted on the same platform.
- What's the difference between MathOverflow & Mathematics.SE? (Meta Stack Exchange)
- Differences between mathoverflow and math.stackexchange. (Meta Mathematics)