A note on the three color problem (Q1805376)
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scientific article; zbMATH DE number 754153
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A note on the three color problem |
scientific article; zbMATH DE number 754153 |
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A note on the three color problem (English)
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11 May 1995
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In 1990 Paul Erdős asked: Is there an integer \(k\geq 5\) such that if \(G\) is a planar graph without \(i\)-circuits, \(4\leq i\leq k\), then \(G\) is 3- colorable? A year later H. L. Abbott and B. Zhou answered this question affirmatively by proving the above with \(k= 11\). This note strengthens their result by showing that \(G\) is 3-colorable, if it is planar without \(i\)-circuits for \(i\) from 4 through 9.
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three color problem
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circuit
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coloring
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face
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critical graph
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planar graph
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0.8984799
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0.8890666
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