Can u give me the definition of the $\displaystyle N_{Aut(A)}(B)$ where B is a subgrroup of A.
Last edited by dimuk; Aug 13th 2008 at 12:56 PM.
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$\displaystyle N_A(B)=\{a\in A:aBa^{-1}=B\}$
Yes this is the normalizer of the groups A and B. But I want to know the normalizer of automorphism of A in B.
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