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Every planar graph with girth at least 5 is (1,9)-colorable |
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| Institution: | 1. School of Mathematics & Statistics, Central China Normal University, 430079, China;2. College of Mathematics and Statistics, Huanggang Normal University, China;3. Department of Mathematics and Statistics, Guangxi Normal University, China |
| Abstract: | |
| Keywords: | Coloring Planar graph Improper coloring Discharging method |
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