Abstract
We introduce the differential polynomial of a graph. The differential polynomial of a graph G of order n is the polynomial \(B(G;x):={\sum}_{k=-n}^{\partial(G)}B_k(G)x^{n+k}\), where Bk(G) denotes the number of vertex subsets of G with differential equal to k. We state some properties of B(G; x) and its coefficients. In particular, we compute the differential polynomial for complete, empty, path, cycle, wheel and double star graphs. We also establish some relationships between B(G; x) and the differential polynomials of graphs which result by removing, adding, and subdividing an edge from G.
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We would like to thank the referees for a careful reading of the manuscript and for some helpful suggestions.
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The third was partially supported by PFCE-UAZ 2018–2019 grant. The last author was supported in part by two grants from Ministerio de Economía y Competitividad, Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER) (MTM2016-78227-C2-1-P and MTM2017-90584-REDT), Spain
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Basilio-Hernández, L.A., Carballosa, W., Leaños, J. et al. On the Differential Polynomial of a Graph. Acta. Math. Sin.-English Ser. 35, 338–354 (2019). https://doi.org/10.1007/s10114-018-7307-3
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DOI: https://doi.org/10.1007/s10114-018-7307-3