𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Regularity Criterion of Noetherian Local Rings of Prime Characteristic

✍ Scribed by Mamoru Furuya; Hiroshi Niitsuma


Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
124 KB
Volume
247
Category
Article
ISSN
0021-8693

No coin nor oath required. For personal study only.

✦ Synopsis


Let R be a local ring of essentially finite type over a field k of characteristic p > 0. We introduce the concept of p n -bases for an integer n > 0, and the notions of an n-admissible field for R/k and of a t -admissible field for R/k. For such a local ring R we give regularity criteria in terms of the higher differential algebra and of a p n -basis, respectively.


πŸ“œ SIMILAR VOLUMES


New Invariants of Noetherian Local Rings
✍ Jee Koh; Kisuk Lee πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 158 KB

We investigate properties of certain invariants of Noetherian local rings, including their behavior under flat local homomorphisms. We show that these invariants are bounded by the multiplicity for Cohen-Macaulay local rings with infinite residue fields, and they all agree with the multiplicity when

Betti Numbers of Modules of Exponent Two
✍ Shou-Te Chang πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 271 KB

Let R, m, K be a regular local ring of dimension n and let M be a finite length module over R. This paper gives an affirmative answer to Horrocks' questions when m 2 M s 0, that is, in this case the rank of the ith syzygy of M is at and the ith Betti number of M is at least .

Valuation ideals of order two in 2-dimen
✍ Sunsook Noh πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 233 KB

## Abstract Let __K__ be the quotient field of a 2‐dimensional regular local ring (__R, m__) and let __v__ be a prime divisor of __R__, i.e., a valuation of __K__ birationally dominating __R__ which is residually transcendental over __R__. Zariski showed that: such prime divisor __v__ is uniquely a

The Core of a Module over a Two-Dimensio
✍ Radha Mohan πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 215 KB

This paper explicitly determines the core of a torsion-free, integrally closed module over a two-dimensional regular local ring. It is analogous to a result of Huneke and Swanson which determines the core of an integrally closed ideal. The main result asserts that the core of a finitely generated, t