The Buchsbaum–Rim Polynomial of a Module☆
The Buchsbaum–Rim Polynomial of a Module☆
复制标题
模的 Buchsbaum–Rim 多项式☆
DOI:
10.1006/jabr.2001.8764
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发表时间:
2001
影响因子:
0.9
通讯作者:
W. Vasconcelos
中科院分区:
文献类型:
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作者:
J. Brennan;B. Ulrich;W. Vasconcelos
Abstract For a Noetherian local ring (R, m ), the Hilbert functions of m -primary ideals provide considerable information about constructions and singularities coded by the ideal. For a module E which is the analogue of such ideals (E is a proper submodule of a free module so that the quotient has finite length), Buchsbaum and Rim defined a similar function and introduced the notion of Buchsbaum–Rim multiplicity br(E) of the module. Unlike in the ideal case, the information about these functions is still scant. When R is Cohen–Macaulay of dimension d > 1 and E has rank r, we develop some of their properties sufficiently enough to establish the following bound for the reduction number of the module E, r(E) ≤ (d + r − 1) · (br(E) − 2) + 1. The same techniques lead to bounds on the number of generators of the integral closure of the powers of certain ideals and modules.
DOI:
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发表时间:
2006
期刊:
Integrable systems, geometry, and topology, AMS/IP Studies of Advanced Mathematics, American Mathematical Society 36
影响因子:
--
作者:
FURUYA;Jun;Martin Guest
通讯作者:
Martin Guest