# Normalizer

• August 13th 2008, 11:33 AM
dimuk
Normalizer
Can u give me the definition of the $N_{Aut(A)}(B)$ where B is a subgrroup of A.
• August 13th 2008, 07:29 PM
JaneBennet
$N_A(B)=\{a\in A:aBa^{-1}=B\}$
• August 13th 2008, 10:53 PM
dimuk
normlizer
Yes this is the normalizer of the groups A and B. But I want to know the normalizer of automorphism of A in B.