Revision as of 19:22, 14 December 2008 by Zhao14 (Talk)

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I found 4 colors. Given a color for A, we need two others for B and E, and since D is adjacent to A B E, we need a fourth. C can have the same color as E. --rtabchou

Sounds about right

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Basic linear algebra uncovers and clarifies very important geometry and algebra.

Dr. Paul Garrett