Integral closure of ideals in excellent local rings
Donatella Delfino, Irena Swanson
Abstract
Let R be an excellent local ring, m its maximal ideal and I an ideal. Then there exists a positive integer c such that for all integers n, the integral closure of (I + mn) is contained in m(n/c) + the integral closure of I. In the proof, a version of the linear Artin approximation theorem is proved.
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