Abstract Algebra: Suppose P is a Sylow p-subgroup of G and P⊲G. Prove that 1) P is the only Sylow p-subgroup of G. 2) Prove that φ(P) = P for every automorphism φ of G.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Abstract Algebra:

Suppose P is a Sylow p-subgroup of G and P⊲G. Prove that

1) P is the only Sylow p-subgroup of G.

2) Prove that φ(P) = P for every automorphism φ of G.

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