Carsten Thomassen proved in 1999 the conjecture made by Erdos and Simonovits in 1973 that for every c greater than 1/3, the triangle-free graphs of minimum degree at least cn have bounded chromatic number. There is no such result if c is less than 1/3. In collaboration with Adrian Bondy and Stephan Thomasse at Universite Claude Bernard,Lyon, Carsten Thomassen studies density conditions implying triangles in graphs.

Status | Current |
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Period | 01/05/1999 → … |

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