Ratliff-Rush Filtration, Regularity and depth of Higher Associated graded modules: Part I

In this paper we introduce a new technique to study associated graded modules. Let $(A,\m)$ be a Noetherian local ring with $\depth A \geq 2$. Our techniques gives a necessary and sufficient condition for $\depth G_{\m^n}(A) \geq 2$ for all $n \gg 0$. Other applications are also included; most notable is an upper bound regarding the Ratliff-Rush filtration.

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