There are 3 different stackexchange sites that deal with this subject (math/cs (computer science)/cstheory (theoretical computer science). Is there a way to ask same question on all stackexcahnged at once? If not, which stackexchange you suggest I use?

  • 3
    $\begingroup$ When in doubt, I’d use MSE. $\endgroup$ Oct 20, 2012 at 15:32
  • $\begingroup$ I don't think that you are supposed to post the "exact" same question on different stack exchange sites, could be wrong though... $\endgroup$
    – hmmmm
    Oct 20, 2012 at 15:46
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    $\begingroup$ I just want to point out that the scope of cstheory.SE is research-level questions. $\endgroup$
    – user2468
    Oct 20, 2012 at 19:55

1 Answer 1


It is poor form to post the same question on multiple sites. Post it on one. If you wait a few days and don't get any answers, then it is generally considered okay to post it on a different site, but I have seen the recommendation of posting a link on each to the other one.

At Math Stackexchange, we have many discrete math questions and many people who can answer them. Of the sites you listed, this site is the biggest by far, so you will probably get your answer quicker here.

For example, we have 1284 questions tagged graph-theory, which is a small subset of discrete mathematics. The computer science site has 1327 questions TOTAL.

  • $\begingroup$ I wonder how to "posting a link on each to the other one"? $\endgroup$
    – Tim
    Oct 20, 2012 at 19:33
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    $\begingroup$ Just put a note at the top of the question saying "This question is also posted on Math Stackexchange" and link to the question. $\endgroup$
    – GeoffDS
    Oct 20, 2012 at 20:04

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