There is known a lot about semigroups, mostly about their inner structure etc. But is there any use of semigroups in the general Maths -- like that of groups?


closed as not a real question by Daniel Moskovich, Nate Eldredge, Zev Chonoles, Simon Thomas, George Lowther Feb 16 '11 at 14:53

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    $\begingroup$ A similar (but to my mind much better) question is mathoverflow.net/questions/20604/… I don't think this question is well-posed. Why is the wikipedia answer insufficient? $\endgroup$ – Daniel Moskovich Feb 16 '11 at 14:22
  • $\begingroup$ Without saying what you mean by "the general Maths" this question is, as Daniel says, not well-posed. $\endgroup$ – Yemon Choi Feb 16 '11 at 20:31
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    $\begingroup$ The question has been re-asked at mathoverflow.net/questions/55885 $\endgroup$ – Yemon Choi Feb 18 '11 at 19:55