In What is the center of a semidirect product?, Alexander Gruber answered a question of user39794. Is there cited reference for this? I want to cite this result. Is it given in some book or paper? Kindly tell me the reference for that.


closed as off-topic by Did, Nick Peterson, azimut, Adriano, Jared Aug 29 '13 at 23:13

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    $\begingroup$ You should ask this as a comment on the original question.... $\endgroup$ – Simon Hayward Aug 29 '13 at 13:14
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    $\begingroup$ This question should be asked as a comment on the question the OP references. $\endgroup$ – Nick Peterson Aug 29 '13 at 21:42
  • $\begingroup$ @ Simon Hayward, @ Nicholas R. Peterson To comment on other question I need 50 reputation score which I do not have. Therefore I asked this as new question. $\endgroup$ – Jacob Aug 30 '13 at 4:52

I dunno if it's anywhere in the literature, I just derived it. If you want, you can cite the MSE post using this BibTeX code

@MISC {243412,
TITLE = {What is the center of a semidirect product, $\operatorname{Z}(G_1 \rtimes_\varphi G_2)$?},
AUTHOR = {Alexander Gruber (http://math.stackexchange.com/users/12952/alexander-gruber)},
HOWPUBLISHED = {Mathematics Stack Exchange},
NOTE = {URL:http://math.stackexchange.com/q/243412 (version: 2013-06-02)},
EPRINT = {http://math.stackexchange.com/q/243412},
URL = {http://math.stackexchange.com/q/243412}

which I got from using MSE's built in citation thingamajig, as described by WillieWong here.

If you don't want to do that, I doubt it'd be in any papers, but you could look around in semidirect product sections in Dummit and Foote or Artin and see if it occurs as a problem somewhere.

  • $\begingroup$ Why answering a question which should have been asked as a comment on the original question? $\endgroup$ – Did Aug 29 '13 at 21:26
  • $\begingroup$ Knew the answer $\endgroup$ – Alexander Gruber Aug 30 '13 at 5:31
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    $\begingroup$ Not sufficient. $\endgroup$ – Did Sep 5 '13 at 9:32
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    $\begingroup$ Sorry but this won't do: to say that one answers any question just because one "knew the answer" is to deliberately flout the fact that MSE has a well defined, restricted, scope, which, by pure logic, implies that some questions are out of this scope. (Incidentally, the tone of your two comments is most peculiar.) $\endgroup$ – Did Sep 5 '13 at 15:37
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    $\begingroup$ To adopt a condescending tone (which you acknowledge) instead of addressing at the onset the specific and restricted point I raised is a choice you can make. Allow me to disagree. $\endgroup$ – Did Sep 6 '13 at 7:46

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