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Tutte polynomials of vertex-weighted graphs and group cohomology
B. S. Bychkovab, A. A. Kazakova, D. V. Talalaeva a Centre of integrable systems,Demidov Yaroslavl State
University, Yaroslavl, Russia
b National Research University "Higher School of Economics", Moscow, Russia
Abstract:
We construct a generalization of the Tutte polynomial for vertex-weighted graphs for which the coefficients of the “deletion–contraction” relation depend nontrivially on the vertex weights. We show that the corresponding relation on the coefficients coincides with the two-cocycle relation in the group cohomology. We obtain a representation of a new invariant by summing over subgraphs and establish its connection with four-invariants of graphs.
Keywords:
Tutte polynomial, group cohomology.
Received: 14.12.2020 Revised: 14.12.2020
Citation:
B. S. Bychkov, A. A. Kazakov, D. V. Talalaev, “Tutte polynomials of vertex-weighted graphs and group cohomology”, TMF, 207:2 (2021), 226–236; Theoret. and Math. Phys., 207:2 (2021), 594–603
Linking options:
https://www.mathnet.ru/eng/tmf10034https://doi.org/10.4213/tmf10034 https://www.mathnet.ru/eng/tmf/v207/i2/p226
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Abstract page: | 317 | Full-text PDF : | 73 | References: | 68 | First page: | 18 |
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