(4) Let G be a finite abelian group. Let V {0} be an irreducible CG-module of finite degree. Let heG. Write Th: V→ V Th(v) = h.v. Show that my is an isomorphism of CG-modules. Show that T = A₁ ly for some À, € C. Show that deg(V) – 1.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.4: Cosets Of A Subgroup
Problem 30E: Let G be an abelian group of order 2n, where n is odd. Use Lagranges Theorem to prove that G...
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(4) Let G be a finite abelian group. Let V + {0} be an irreducible CG-module of
finite degree.
(a)
Let he G. Write
Th: VV,
*A(v) = h v.
Show that m is an isomorphism of CG-modules
(b)
Show that ,= A for some A, EC.
Show that deg(V)- 1
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Transcribed Image Text:(4) Let G be a finite abelian group. Let V + {0} be an irreducible CG-module of finite degree. (a) Let he G. Write Th: VV, *A(v) = h v. Show that m is an isomorphism of CG-modules (b) Show that ,= A for some A, EC. Show that deg(V)- 1 What do you exactly need?
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