Ordinary and symbolic Rees algebras for ideals of Fermat point configurations
Ordinary and symbolic Rees algebras for ideals of Fermat point configurations
复制标题
费马点配置理想的普通和符号里斯代数
DOI:
10.1016/j.jalgebra.2016.08.011
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发表时间:
2016
影响因子:
0.9
通讯作者:
Seceleanu, Alexandra
中科院分区:
文献类型:
--
作者:
Nagel, Uwe;Seceleanu, Alexandra
Fermat ideals define planar point configurations that are closely related to the intersection locus of the members of a specific pencil of curves. These ideals have gained recent popularity as counterexamples to some proposed containments between symbolic and ordinary powers [6]. We give a systematic treatment of the family of Fermat ideals, describing explicitly the minimal generators and the minimal free resolutions of all their ordinary powers as well as many symbolic powers. We use these to study the ordinary and the symbolic Rees algebra of Fermat ideals. Specifically, we show that the symbolic Rees algebras of Fermat ideals are Noetherian. Along the way, we give formulas for the Castelnuovo–Mumford regularity of powers of Fermat ideals and we determine their reduction ideals.
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DOI:
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发表时间:
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期刊:
Canadian Journal of Mathematics - Journal Canadien de Mathematiques
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DOI:
10.1090/s0002-9939-1988-0934849-8
发表时间:
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期刊:
Canadian Journal of Mathematics
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