In lecture we have seen the permutation representation of the symmetric group Sn, which gives a group homomorphism p: Sn → GL(C"). Recall that this is defined by p(g)v¡ = Ug(i), where U₁, ..., Un are the standard basis vectors of C". We'll be considering properties of this homomorphism. Exercise B (see below for markdown cell) Show that tr(p(g)) is equal to the number of x E {1,..., n} such that g(x) = x.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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In lecture we have seen the permutation representation of the symmetric group Sn, which gives a group homomorphism p: Sn
defined by
p(g)V¡ = Ug(i),
where U1,
...., Un are the standard basis vectors of C".
We'll be considering properties of this homomorphism.
Exercise B (see below for markdown cell) Show that tr(p(g)) is equal to the number of x € {1,..., n} such that g(x) = X.
GL(C"). Recall that this is
Transcribed Image Text:In lecture we have seen the permutation representation of the symmetric group Sn, which gives a group homomorphism p: Sn defined by p(g)V¡ = Ug(i), where U1, ...., Un are the standard basis vectors of C". We'll be considering properties of this homomorphism. Exercise B (see below for markdown cell) Show that tr(p(g)) is equal to the number of x € {1,..., n} such that g(x) = X. GL(C"). Recall that this is
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