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Homework Help: Graph Proof

  1. Mar 7, 2013 #1
    1. The problem statement, all variables and given/known data
    Let G be a graph. Let ω(G) be the size o the largest independent set of G. Let χ(G) be the chromatic number of G. If g has n verticies, show ω(G)χ(G) >= n.

    2. Relevant equations
    There's no equations since this is a proof.

    3. The attempt at a solution
    I tried to do a direct proof by going though and sandwiching n between some other values, but then I realized that there was no way to claim n > x and n > z => z < x < n.
  2. jcsd
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