Results 1 to 1 of 1

Math Help - Every vertex in a 5-chroma planar graph must have degree >=5. WHY?!

  1. #1
    Newbie
    Joined
    Feb 2010
    Posts
    3

    Every vertex in a 5-chroma planar graph must have degree >=5. WHY?!

    I keep reading that Kempe has proven that every vertex in a 5-chroma planar graph must have degree >= 5, but nowhere can I find this proof.

    Could someone please explain the proof or point me in the right direction?

    Many thanks in advance,
    Katie
    Last edited by ktharmer; April 19th 2012 at 11:35 AM. Reason: > sign wrong way round!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: December 22nd 2010, 01:42 AM
  2. Planar graph
    Posted in the Discrete Math Forum
    Replies: 7
    Last Post: July 24th 2010, 07:21 AM
  3. is this graph planar?
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: March 3rd 2010, 01:32 PM
  4. isomorphic graph, planar graph
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: May 9th 2009, 08:13 AM
  5. Planar Graph problem
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: September 15th 2007, 12:26 AM

Search Tags


/mathhelpforum @mathhelpforum