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Homework Help: Sylow p-groups

  1. Dec 22, 2009 #1
    1. The problem statement, all variables and given/known data

    This question is about sylow-p groups of Sp.

    I've proved these parts of the question:
    A. Each sylow p-sbgrp is from order p and there are (p-2)! p-sylow sbgrps of Sp.
    B. (p-1)! = -1 (mod p ) [Wilson Theorem]

    I need your help in these two :
    C. 1) Let G be a group of order n*p^(k) where gcd(n,p)=1 and k>=1.
    Prove that the normalizers of the p-sylow sbgrps of G are conjugated

    C. 2) Make use of C.1), and find the order of the normalizer of a sylow-p-sbgrp of Sp.

    2. Relevant equations
    3. The attempt at a solution

    About c1:
    I proved it using the sylow-theorem that says that two sylow sbgrps are conjugated... I'm not sure that is the thing with the order.... Is it matter that the order is n*p^k? The argument is also true for an arbitrary group, no?

    About c2:

    I'm not that sure, but according to the theorem that says:
    o(G)/o(N(P)) = Number of conjugates to P

    We'll get that the order of the normalizer of N(P) (where P is a sylow-p-sbgrp) is p! (the order of Sp) divided by the number of conjugates to P, which are all the elements of the normalizers of the sylow-p-sbgrps...
    Which means that it's p! / (p-2)!*p = (p-1)! / (p-2)! = p-1..

    Verification and help are needed!!

    TNX everyone!
  2. jcsd
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