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dc.contributor.authorThoma, A.en
dc.contributor.authorCharalambous, H.en
dc.date.accessioned2015-11-24T17:26:22Z-
dc.date.available2015-11-24T17:26:22Z-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/13192-
dc.rightsDefault Licence-
dc.subjectResolutions, lattice ideal, syzygies, indispensable syzygies, Scarfen
dc.subjectcomplex.en
dc.titleOn simple A-multigraded minimal resolutionsen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μαθηματικώνel
heal.publicationDate2009-
heal.abstractLet A be a semigroup whose only invertible element is 0. For an A-homogeneous ideal we discuss the notions of simple i-syzygies and simple minimal free resolutions of R/I. When I is a lattice ideal, the simple 0-syzygies of R/I are the binomials in I. We show that for an appropriate choice of bases every A-homogeneous minimal free resolution of R/I is simple. We introduce the gcd-complex gcd(b) for a degree b 2 A. We show that the homology of gcd(b) determines the i-Betti numbers of degree b. We discuss the notion of an indispensable complex of R/I. We show that the Koszul complex of a complete intersection lattice ideal I is the indispensable resolution of R/I when the A-degrees of the elements of the generating R-sequence are incomparable.en
heal.journalNameCommutative Algebraen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΜΑΘ

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