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Munkres lemma 81.1

  1. Feb 7, 2008 #1
    [SOLVED] munkres lemma 81.1

    1. The problem statement, all variables and given/known data
    Please stop reading this if you do not have Munkres.

    The statement of this lemma implies that pi_1(B,b_0)/H_0 is a group. That does not make sense to me because H_0 is not necessarily normal in pi_1(B,b_0).

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Feb 8, 2008 #2
    Replace the word subgroup with subset and the statement becomes less confusing. Munkres is only talking about \pi_1(B, b_0) / H_0 as a set of cosets.
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