Submit a problem
Post a problem from a university course, a contest, or your own curiosity. You can write LaTeX in the title and the body. A thread opens immediately so others can start replying. Draft auto-saves as you type.
How to post a great problem
- • Define your symbols once (then reuse them consistently).
- • Add tags that describe the main idea, not every detail.
- • If it’s from a course, mention the course code in tags (e.g.,
mat312). - • Aim for clarity. Math can be hard; the English shouldn’t be.
LaTeX and preview (what to expect)
- • Inline maths:
$x^2 + y^2$or\(x^2+y^2\) - • Display maths:
$$\int_0^1 x^n\,dx$$or\[\int_0^1 x^n\,dx\] - • Multi-line:
\begin{align} ... \end{align}(best for step-by-step work). - • The preview uses MathJax (standard LaTeX works; packages are not supported).
- • Very long equations may scroll sideways in the preview — especially on mobile.
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Browse existing problems, solutions, and the archive.
Submit a problem
Write it like you’re handing it to a friend: clear assumptions, readable text, and math that
renders.
Live MathJax preview
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Submissions may be reviewed before appearing on the public list. Your thread still opens immediately, so discussion can start right away.