What is up with this site: https://mathoverflow.net/ ? Is it a clone or something? I wasn't paying attention and went to login, and it says that my name is unknown... What's up? I revoked access from my Google account just to be sure.


2 Answers 2


-overflow and -stackexchange are sister sites, mathoverflow specifically is research-level math-oriented, while math.stackexchange is open to questions of all levels (thanks Arturo).

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    $\begingroup$ I would not call it "less serious", but rather "open to questions at all levels." I for one take it seriously. $\endgroup$ Commented Jan 18, 2011 at 16:52
  • $\begingroup$ Ah! Is there a reason why it said I was unknown when I linked my Google OpenId? I've never had that problem on any Stack sites. $\endgroup$
    – Josh
    Commented Jan 18, 2011 at 16:53
  • $\begingroup$ Thanks Arturo, fixed it. Josh, that could be because its an overflow site and not a stack site, I am not sure how cross-linking works with those. $\endgroup$ Commented Jan 18, 2011 at 16:55
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    $\begingroup$ MathOverflow and math.stackexchange are "sister sites" in the sense that there are a number of users who are active on both sites, but on a technical level, the software running them is completely independent. @Josh: MathOverflow is not part of the Stack Exchange 2.0 network, so it doesn't know about your login. See en.wikipedia.org/wiki/Stack_Exchange_Network#StackExchange_1.0 for a little bit of history on how this came about. $\endgroup$
    – user856
    Commented Jan 18, 2011 at 17:20
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    $\begingroup$ And also note that the fact MathOverflow runs on StackExchange 1.0 is one indication of the fact that it actually pre-dates Math.StackExchange (which only came about after the SE2 platform). So no, it certainly is not a clone. $\endgroup$ Commented Jan 18, 2011 at 18:13

That site runs on the Stack Exchange 1.0 platform.

These sites run on the Stack Exchange 2.0 platform.

For more detail and context see:


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