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A class of edge ideals with regularity at most four

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If a graph $G$ is both claw-free and gap-free, then E. Nevo showed that the Castelnuovo-Mumford regularity of the associated edge ideal $I(G)$ is at most three. Later Dao, Huneke and Schwieg gave a simpler proof of this result. In this paper we introduce a class of edge ideals with Castelnuovo-Munmford regularity at most four.

Abstract

If a graph $G$ is both claw-free and gap-free, then E. Nevo showed that the Castelnuovo-Mumford regularity of the associated edge ideal $I(G)$ is at most three. Later Dao, Huneke and Schwieg gave a simpler proof of this result. In this paper we introduce a class of edge ideals with Castelnuovo-Munmford regularity at most four.

참고문헌 (12)

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  6. H. T. Ha, "Monomial ideals, edge ideals of hypergraphs, and their graded Betti numbers", J. Algebraic Combin, 27(2), pp.215~245 (2008)
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  9. E. Nevo, "Regularity of edge ideals of C4-free graphs via the topology of the lcm-lattice", J. Combin. Theory Ser. A, 118(2), pp.491~501 (2011)
  10. S. A. Seyed Fakhari, "Depth, Stanley depth, and regularity of ideals associated to graphs", Arch. Math. (Basel), 107(5), pp.461~471 (2016)
  11. S. A. Seyed Fakhari, "Improved bounds for the regularity of edge ideals of graphs", Collect. Math, 69(2), pp.249~262 (2018)
  12. R. Woodroofe, "Matchings, coverings, and Castelnuovo-Mumford regularity", J. Commut. Algebra, 6(2), pp.287~304 (2014)

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