Author

Ton That Quoc Tan

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Preprint Sep 2026

An Improved Upper Bound for the Perturbation Index

Let $(R,\mathfrak m)$ be a Noetherian local ring and $J$ be an arbitrary ideal of $R$. Suppose that $f_1,\ldots,f_r$ is a $J$-filter regular sequence in $R$ and $I=(f_1,\ldots,f_r)$. In this paper, we establish an improved upper bound for the perturbation index of the associated graded ring $\mathrm{gr}_J(R/I)$, refini...

Ton That Quoc Tan · 1 citation