Genera of numerical semigroups and polynomial identities for degrees of syzygies
Genera of numerical semigroups and polynomial identities for degrees of syzygies
复制标题
数值半群的属和 syzygies 度的多项式恒等式
DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
L. Fel
中科院分区:
文献类型:
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作者:
L. Fel
We derive polynomial identities of arbitrary degree n for syzygies degrees of numerical semigroups Sm= 〈d1, . . . , dm〉 and show that for n ≥ m they contain higher genera Gr= ∑ s∈Z>\Sm s of Sm. We find a number gm=Bm −m+1 of algebraically independent genera Gr and equations, related any of gm + 1 genera, where Bm= ∑m−1 k=1 βk and βk denote the total and partial Betti numbers of non-symmetric semigroups. The number gm is strongly dependent on symmetry of Sm and decreases for symmetric semigroups and complete intersections.
DOI:
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发表时间:
2021
期刊:
影响因子:
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作者:
Keiichi Watanabe
通讯作者:
Keiichi Watanabe