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  1. What is an intuitive, straightforward explanation of the cohomological dimension of a group ?

  2. How does one compute the cohomological dimension of a group ?

  3. Is there a good reference that explains this concept and provides examples ?

I am particularly interested in the cohomological dimension of the braid group $\mathcal{B}_n$ and some of its subgroups.

  • 7
    The first three questions can be answered in two words: [read Brown](http://books.google.com/books?id=6x0mfOUFYgsC).2011-06-29
  • 0
    http://mathoverflow.net/questions/69117/cohomological-dimension-of-mathcalb-n2011-06-29

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