Asymptotic growth of saturated powers and epsilon multiplicity

Details Asymptotic growth of saturated powers and epsilon multiplicity Asymptotic growth of saturated powers and epsilon multiplicity

2010-09-21

arxiv.org/abs/1009.4111v4

Mathematics

Commutative Algebra

9 pages. In the revised version a typo ("n" changed to "k") is fixed in the statement of Corollary 1.3. A couple of new coroll

Scientific paper

Asymptotic properties of saturated powers of modules over a local domain R are studied. Under mild conditions, it is shown that the limit as k goes to infinity of the quotient of the saturation of the k-th power of a module E by the k-th power of E, when divided by k^{d+e-1}, exists. Here d is the dimension of R and e is the rank of E. We deduce that under these assumptions, the epsilon multiplicity of E, defined by Ulrich and Validashti as a limsup, actually exists as a limit.

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