A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
for discussing platform-wide changes to StackExchange, especially how they impact the MathOverflow site.
Questions about suspected user spam, the spam flag or combating spam as a community
for questions on Meta that relate to a specific answer on MathOverflow. (If a linked answer serves only as an example of a more general issue you want to discuss, this tag should not be u…
For discussions related to some particular question posted (or to be posted) on the main site. Do not use if your intention is to discuss/ask about a general issue, and you merely linked some question…
For questions which focus on a particular user, rather than those discussing general user issues.
Spoilers are text which is hidden until you move cursor above it. It might be useful when for separating full solution from a hint.
Questions about sizes and other quantities of MathOverflow, e.g., number of questions, GB/day transferred, voting statistics, etc.
Indicates that the reported behavior is intentional and not subject to change
Indicates that a feature request has been implemented, a bug has been fixed, or another type of request has been processed.
Indicates that the feature request or bug is something that is intended to be implemented or fixed, but not in the near term.
Indicates that the site developers were not able to replicate the behavior reported.
Indicates that the feature request or bug is something that is intended to be implemented or fixed, ideally in the near term.
Indicates that the site developers were able to replicate the behavior reported, but cannot address its cause at this time.
Indicates that a change in functionality is currently under consideration, or needs further investigation.
Users without full edit privileges can suggest edits to posts and tag wikis
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For questions concerning tag-synonyms.
For questions about tag watching (previously called favorite tags). This feature allows a user to select a set of tags on a Stack Exchange site for highlighting in question lists.
Tag-wiki is an editable page that briefly summarizes the topic of the tag and that may provide links to existing questions that are often useful to many people. Sometimes tag-wiki also includes short …
"tea" is the name currently used for the old meta site of MathOverflow, which is now hosted on http://mathoverflow.tqft.net/ In contrast to the current site it was not Q&A based.
The black bar across the top of the MathOverflow site. (Similarly, on others Stack Exchange sites.)
For questions about arXiv trackbacks. (And trackbacks from other places.)
Unanswered questions are those questions which have neither an accepted answer nor answers with positive vote count. Note that our definition is strict!
for questions regarding unregistered users.
For questions regarding user names (display names) and what is allowed in them.