# Tag Info

### Before MathOverflow

Before MathOverflow, the culture of mathematics question-and-answers was quite primitive. I remember the days when a student would impress their mathematics questions, expressed in cuneiform, by ...

### Requests for reopen and undelete votes for closed and deleted questions

[RE-OPENED and later CLOSED again] The question How the idea of adjoint matrix has been designed? isn't great, but isn't awful, and these two answers have been posted (and upvoted) on G+ rather than ...
Accepted

### Before MathOverflow

Usenet For example, these newsgroups: sci.math sci.math.research sci.math.num-analysis sci.math.symbolic See back in time to them HERE
• 38.8k

### Examples of mathematical exposition arising from MO answers

This paper resulted from a question on mathoverflow. This monograph on properties of 3-manifold groups has now appeared in print.
• 63.1k

### Interesting (and not sufficiently answered) questions on math.SE

Does the open mapping theorem imply the Baire category theorem? The open mapping theorem and the Baire category theorem are both theorems of ZFC, but are independent of ZF. Working in ZF, one can (...
• 28.1k

### Interesting (and not sufficiently answered) questions on math.SE

Is there an injective cubic polynomial $\mathbb Z^2\rightarrow\mathbb Z$? This question asks exactly what its title suggests: is there a polynomial of degree $3$ in $\mathbb Z[x,y]$ whose induced map ...
• 555

### Requests for reopen and undelete votes for closed and deleted questions

[REOPENED] "Find a TSP tour passing through at least one node in each set of nodes" was initially unclear, but the author has now clarified it into a real question (and I corrected the English): Is ...

### Requests for reopen and undelete votes for closed and deleted questions

[REOPENED] The question Identify one group of linear transformations was closed as "unclear what you're asking". Afterwards it has been edited and clarified. I don't see what is still "unclear" in ...

### Requests for reopen and undelete votes for closed and deleted questions

[UNDELETED] [REOPENED] [CLOSED] I would suggest to undelete/reopen https://mathoverflow.net/q/328312, as a courtesy and sign of respect, and then hopefully one of our experts can answer it. I know, ...

### Requests for reopen and undelete votes for closed and deleted questions

Status: [REOPENED] Thank you! Request to reopen How to obtain the rational solution of a linear system efficiently?. In light of recent discussions about being more welcoming to good faith questions ...

### Requests for reopen and undelete votes for closed and deleted questions

https://mathoverflow.net/questions/379145/geometric-combinatorial-problem-in-the-euclidean-space This question was deleted by nobody less than @ToddTrimble just 10 days ago after having 9 upvotes and ...

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