Mathematics Stack Exchange is for people studying mathematics at any level and professionals in related fields. We welcome questions about:

Before you ask, however, maybe you want to peruse our list of common math questions?

There are certain subjects that, while still on-topic here, might be better addressed by one of our sister sites:

And some kinds of questions are considered off-topic:

• Physics, engineering and financial questions — it is fine to ask about the mathematical models and techniques, but concepts of the field would be off-topic. You should instead ask those questions at other Stack Exchange sites such as:
• Typesetting equations — you can read our guideline for writing equations on this site, or visit the TeX - LaTeX Stack Exchange for questions about TeX and friends
• Numerology
Our interface supports the use of MathJax by using a LaTeX-like syntax after enclosing mathematics expressions in dollar signs $[put math expression here]$. For a quick tutorial and command reference, please see this FAQ item; see also this Meta discussion for some additional pointers and references.