User sara - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-19T05:43:37Z http://mathoverflow.net/feeds/user/22677 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/94841/group-pgl2-p-where-p-is-prime Group PGL(2,p) where p is prime Sara 2012-04-22T12:07:21Z 2012-12-19T16:23:36Z <p>Is there solvable group $G$ such that prime graph $G$ equal to prime graph $PGL(2,p)$ and $|G|=|PSL(2,p)|$?</p> http://mathoverflow.net/questions/95554/reference-request-for-the-number-of-sylow-p-subgroups Reference request for the number of Sylow p-subgroups Sara 2012-04-30T06:05:45Z 2012-05-01T13:12:45Z <p>Let $G$ be simple group of Lie type or Alternating group. I need reference for find the number of Sylow $p$-subgroup $G$ for every $p$. Thanks a lot.</p> http://mathoverflow.net/questions/93215/the-prime-divisors-of-a-simple-group The prime divisors of a simple group Sara 2012-04-05T13:28:46Z 2012-04-07T13:08:23Z <p>Let $G$ be a finite simple group such that $\pi (G)=\pi (A_{n})$, where $n\geq 23$ ($\pi (G)$ is the set of prime divisors of the order of $G$). Is it true that $G$ is isomorphic to an alternating group?</p> http://mathoverflow.net/questions/98865/question-in-number-theory Comment by Sara Sara 2012-06-05T13:09:22Z 2012-06-05T13:09:22Z Whether the equation $p^{2}-2$ $=0$ mod $r$ has any solutions? http://mathoverflow.net/questions/96464/centeral-normal-subgroup Comment by Sara Sara 2012-05-10T03:46:38Z 2012-05-10T03:46:38Z Thanks, now I see. http://mathoverflow.net/questions/96464/centeral-normal-subgroup Comment by Sara Sara 2012-05-09T17:34:24Z 2012-05-09T17:34:24Z I donn't know if this is homework why not received any answer. http://mathoverflow.net/questions/95554/reference-request-for-the-number-of-sylow-p-subgroups/95621#95621 Comment by Sara Sara 2012-05-01T14:48:21Z 2012-05-01T14:48:21Z Many thanks to Derek Holt, Ralph and Jim Humphereys, who all gave the same answer. http://mathoverflow.net/questions/93215/the-prime-divisors-of-a-simple-group Comment by Sara Sara 2012-04-05T15:03:02Z 2012-04-05T15:03:02Z In my question $A_{n}$ the alternating group on n letters. Thanks