Back to Search
Start Over
Vanishing of (co)homology of Burch and related submodules
- Source :
- Illinois Journal of Mathematics. 67
- Publication Year :
- 2023
- Publisher :
- Duke University Press, 2023.
-
Abstract
- We introduce the notion of Burch submodules and weakly $\mathfrak m$-full submodules of modules over local rings and study their properties. One of our main results shows that Burch submodules satisfy 2-Tor rigid and test property. We also show that over a local ring $(R,\mathfrak m)$ a submodule $M$ of a finitely generated $R$-module $X$, such that either $M=\mathfrak m X$ or $M(\subseteq \mathfrak m X$) is weakly $\mathfrak m$-full in $X$, is 1-Tor rigid and a test module provided that $X$ is faithful (and $X/M$ has finite length when $M$ is weakly $\mathfrak m$-full). As an application, we give a new class of rings such that a conjecture of Huneke and Wiegand is affirmative over them.<br />Revised version; 31 pages. Key word Ulrich module and some new results added. Accepted at Illinois Journal of Mathematics
Details
- ISSN :
- 00192082
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- Illinois Journal of Mathematics
- Accession number :
- edsair.doi.dedup.....a824864e36f1019b46daeba890c3260d