We extend the sortability concept to monomial ideals which are not necessarily generated in one degree and as an application we obtain normal Cohen-Macaulay toric rings attached to vertex cover ideals of graphs. Moreover, we consider a construction on a graph called a clique multiwhiskering which always produces vertex cover ideals with componentwise linear powers. & COPY; 2023 Elsevier Inc. All rights reserved.
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IIT, Dept Appl Math, Chicago, IL 60616 USAIIT, Dept Appl Math, Chicago, IL 60616 USA
Petrovic, Sonja
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机构:
Thoma, Apostolos
Vladoiu, Marius
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Purdue Univ, Dept Math, 150 N Univ St, W Lafayette, IN 47907 USA
Univ Bucharest, Fac Math & Comp Sci, Str Acad 14, RO-010014 Bucharest, Romania
Romanian Acad, Simion Stoilow Inst Math, POB 1-764, Bucharest 014700, RomaniaIIT, Dept Appl Math, Chicago, IL 60616 USA
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Univ La Laguna, Fac Ciencias, Inst Matemat & Aplicac IMAULL, Secc Matemat, San Cristobal la Laguna 38200, SpainUniv La Laguna, Fac Ciencias, Inst Matemat & Aplicac IMAULL, Secc Matemat, San Cristobal la Laguna 38200, Spain
Garcia-Marco, Ignacio
Tatakis, Christos
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Univ Ioannina, Dept Math, GR-45110 Ioannina, GreeceUniv La Laguna, Fac Ciencias, Inst Matemat & Aplicac IMAULL, Secc Matemat, San Cristobal la Laguna 38200, Spain