On reducibility in the four color problem

  • Hassler Whitney
Part of the Contemporary Mathematicians book series (CM)


Quite recently, Y. Shimamoto showed (Report, AMD 618, Brookhaven National Laboratory) that the four color map theorem would be proved if a certain configuration H of H. Heesch were proved “D-reducible.” A computer program has been run (considering nearly 200,000 different colorings of the boundary C of H, each one a complicated problem); the computer said “yes.” I am told that the computer was asked the wrong question.


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Copyright information

© Birkhäuser Boston 1992

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  • Hassler Whitney

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