Let s in G, s is not equal to 1.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Let s in G, s is not equal to 1. Suppose that
the number of elements c(s) of the
conjugacy class containing s is a power of a
prime number p. Show that there exists an
irreducible character x not equal to the unit
character. such that X(s) not equal O and
X(1) not congurant O (mod p). Let p be a
representation with character x, and show
that p(a) is a homothety. Conclude that, if N
is the kernel of p, we have N not equal to G,
and the image of s in G/N belongs to the
center of G/N..
Transcribed Image Text:Let s in G, s is not equal to 1. Suppose that the number of elements c(s) of the conjugacy class containing s is a power of a prime number p. Show that there exists an irreducible character x not equal to the unit character. such that X(s) not equal O and X(1) not congurant O (mod p). Let p be a representation with character x, and show that p(a) is a homothety. Conclude that, if N is the kernel of p, we have N not equal to G, and the image of s in G/N belongs to the center of G/N..
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