4-critical graphs on surfaces without contractible (≤ 4)-cycles Zdenˇek Dvoˇra´k∗ Bernard Lidick´ y† - Orion - Document - PDFSEARCH.IO

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	4-critical graphs on surfaces without contractible (≤ 4)-cycles Zdenˇek Dvoˇra´k∗ Bernard Lidick´ y† Add to Reading List Document Date: 2014-08-22 14:44:46 Open Document File Size: 653,67 KB Share Result on Facebook

4-critical graphs on surfaces without contractible (≤ 4)-cycles Zdenˇek Dvoˇra´k∗ Bernard Lidick´ y†Add to Reading List