$\operatorname{v}$-numbers of integral closure filtrations of monomial ideals
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arXiv
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| Format: | Preprint |
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2025
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| author | A, Vanmathi Sarkar, Parangama |
| author_facet | A, Vanmathi Sarkar, Parangama |
| contents | In this article, we investigate the $\operatorname{v}$-numbers of powers of monomial ideals and their integral closures in a polynomial ring $S$. We provide an alternative proof for determining the $\operatorname{v}$-numbers of powers of complete intersection monomial ideals. Furthermore, we analyze the $\operatorname{v}$-numbers associated to integral closure filtrations of irreducible monomial ideals and explore their relationship with the Castelnuovo-Mumford regularity of these ideals. Consequently, we obtain that for all $n\geq 1$, $\operatorname{reg}(S/\overline{I^n})=\operatorname{v}(\overline{I^n})=nα(I)-1$ where $I$ is an equigenerated irreducible monomial ideal. Finally, we give an upper bound for $\operatorname{v}$-numbers associated to the integral closure filtrations of complete intersection monomial ideals and explicitly compute these $\operatorname{v}$-numbers in certain cases. As a consequence, we show that for any integer $a\geq 1$, there exists a height two equigenerated complete intersection monomial ideal $I$ such that $\operatorname{reg}(S/\overline{I^n})-\operatorname{v}(\overline{I^n})=a-1$ for all $n\geq 1$. Moreover, we establish that for complete intersection monomial ideals, the $\operatorname{v}$-numbers of powers of ideals can be arbitrarily larger than the $\operatorname{v}$-numbers of integral closures of their powers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_09051 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $\operatorname{v}$-numbers of integral closure filtrations of monomial ideals A, Vanmathi Sarkar, Parangama Commutative Algebra In this article, we investigate the $\operatorname{v}$-numbers of powers of monomial ideals and their integral closures in a polynomial ring $S$. We provide an alternative proof for determining the $\operatorname{v}$-numbers of powers of complete intersection monomial ideals. Furthermore, we analyze the $\operatorname{v}$-numbers associated to integral closure filtrations of irreducible monomial ideals and explore their relationship with the Castelnuovo-Mumford regularity of these ideals. Consequently, we obtain that for all $n\geq 1$, $\operatorname{reg}(S/\overline{I^n})=\operatorname{v}(\overline{I^n})=nα(I)-1$ where $I$ is an equigenerated irreducible monomial ideal. Finally, we give an upper bound for $\operatorname{v}$-numbers associated to the integral closure filtrations of complete intersection monomial ideals and explicitly compute these $\operatorname{v}$-numbers in certain cases. As a consequence, we show that for any integer $a\geq 1$, there exists a height two equigenerated complete intersection monomial ideal $I$ such that $\operatorname{reg}(S/\overline{I^n})-\operatorname{v}(\overline{I^n})=a-1$ for all $n\geq 1$. Moreover, we establish that for complete intersection monomial ideals, the $\operatorname{v}$-numbers of powers of ideals can be arbitrarily larger than the $\operatorname{v}$-numbers of integral closures of their powers. |
| title | $\operatorname{v}$-numbers of integral closure filtrations of monomial ideals |
| topic | Commutative Algebra |
| url | https://arxiv.org/abs/2506.09051 |