The Weisfeiler-Leman dimension of planar graphs is at most 3
The Weisfeiler-Leman dimension of planar graphs is at most 3
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DOI:
10.1145/3333003
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发表时间:
2017-06
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影响因子:
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通讯作者:
Sandra Kiefer;I. Ponomarenko;Pascal Schweitzer
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文献类型:
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作者:
Sandra Kiefer;I. Ponomarenko;Pascal Schweitzer
We prove that the Weisfeiler-Leman (WL) dimension of the class of all finite planar graphs is at most 3. In particular, every finite planar graph is definable in first-order logic with counting using at most 4 variables. The previously best known upper bounds for the dimension and number of variables were 14 and 15, respectively.