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bio website mathematik.uni-wuerzburg.de/…
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age 48
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I'm a professor of mathematics at the University of W├╝rzburg (Germany). For further infos see my web page.


Sep
24
awarded  Autobiographer
Aug
23
comment A Gap code for the alternating group $A_4$
If $G=AB$, then $G=ABg$ for any $g\in G$. So $B$ may be replaced with $Bg$. Now pick $g=b^{-1}$ with $b\in B$.
Aug
22
awarded  Critic
Aug
22
comment A Gap code for the alternating group $A_4$
@Alexander Konovalov: I believe that you misunderstood the question. It is about $G=AB$, where $AB$ is the set of products $ab$ with $a\in A$, $b\in B$. So also your comment to my question doesn't make sense either.
Aug
17
awarded  Yearling
Aug
15
answered A Gap code for the alternating group $A_4$
Feb
22
answered Normal subgroups of finite solvable groups
Jun
14
comment Bunyakovsky conjecture
I believe there is something wrong in Hagen's answer: Pick $f(X)=X(X-3)+1$. Then $\lvert f(3)\rvert=1=k$, but $3>2=\lvert f(0)\rvert+k$.
Jun
14
answered Bunyakovsky conjecture
Jun
14
awarded  Revival
Jun
14
awarded  Supporter
Jun
14
awarded  Teacher
Jun
14
awarded  Editor
Jun
14
comment Covering a group with the conjugates of two subgroups related by an automorphism
Thanks, sorry, as you apparently expected I meant to say `no'. Fixed now.
Jun
14
revised Covering a group with the conjugates of two subgroups related by an automorphism
deleted 1 characters in body
Jun
14
answered Covering a group with the conjugates of two subgroups related by an automorphism