Fluctuations in depth and associated primes of powers of ideals
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866915855238955008 |
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| author | Rissner, Roswitha Swanson, Irena |
| author_facet | Rissner, Roswitha Swanson, Irena |
| contents | We count the numbers of associated primes of powers of ideals as defined by Bandari, Hibi, and Herzog in 2014. We generalize those ideals to monomial ideals $\operatorname{BHH}(m,r,s)$ for $r \ge 2$, $m$, $s \ge 1$; we establish partially the associated primes of powers of these ideals, and we establish completely the depth function of quotients by powers of these ideals: the depth function is periodic of period $r$ repeated $m$ times on the initial interval before settling to a constant value. The number of needed variables for these depth functions are lower than those from general constructions by Hà, Nguyen, Trung, and Trung (2021). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_15083 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fluctuations in depth and associated primes of powers of ideals Rissner, Roswitha Swanson, Irena Commutative Algebra 13A15 (Primary) 13C15, 13F20 (Secondary) We count the numbers of associated primes of powers of ideals as defined by Bandari, Hibi, and Herzog in 2014. We generalize those ideals to monomial ideals $\operatorname{BHH}(m,r,s)$ for $r \ge 2$, $m$, $s \ge 1$; we establish partially the associated primes of powers of these ideals, and we establish completely the depth function of quotients by powers of these ideals: the depth function is periodic of period $r$ repeated $m$ times on the initial interval before settling to a constant value. The number of needed variables for these depth functions are lower than those from general constructions by Hà, Nguyen, Trung, and Trung (2021). |
| title | Fluctuations in depth and associated primes of powers of ideals |
| topic | Commutative Algebra 13A15 (Primary) 13C15, 13F20 (Secondary) |
| url | https://arxiv.org/abs/2309.15083 |