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Bounds on the lower size of A 7-critical graph |
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| Authors: | Huanping Liu Zhongfu Zhang Dean Shen |
| Institution: | (1) Department of Mathematics, Harbin Normal University, 150080 Harbin, China;(2) Department of Mathematics, Lanzhou Railway Institute, 730070 Lanzhou, China;(3) Harbin Electrical Technology Institute, 150040 Harbin, China |
| Abstract: | In this paper, the authors have obtained some lower bounds on the size of a 7-critical graph,and some results about the planar graph conjecture have been given. |
| Keywords: | Edge-coloring chromatic index |
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