File:Hdetniemi conjecture example.svg
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English: The tensor product of C5 and C3 (on the left) produces a graph containing a cycles with length 15 (on the right). Since this graph contains an odd cycle, it requires three colors; Hedetniemi's conjecture states more generally that the chromatic number of a graph tensor product is always at least equal to the smaller chromatic number of the factors. |
| Date | |
| Source | Own work |
| Author | Rocchini |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:59, 21 August 2012 | | 1,200 × 800 (6 KB) | David Eppstein (talk | contribs) | Add the rest of the edges in the tensor product |
| 12:57, 11 June 2012 |  | 1,200 × 800 (3 KB) | Rocchini (talk | contribs) |
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