Contemporary Abstract Algebra

.Let G be a group.

Show that the set Aut(G) consisting of all automorphisms of G is a subgroup of Sym(G)

Show that if G is non-abelian, then |Aut(G)|>1.

2.Determine, with justification, the group Aut(Z10) (your answer should include a full table of products). Is it abelian?

3.Let n≥2. Determine, with justification, the index of On(R) in GLn(R)


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