Published 2021 | Version v1
Publication

Decomposition of local cohomology tables of modules with large E-depth

Description

We introduce the notion of E-depth of graded modules over polynomial rings to measure the depth of certain Ext modules. First, we characterize graded modules over polynomial rings with (sufficiently) large E-depth as those modules whose (sufficiently) partial general initial submodules preserve the Hilbert function of local cohomology modules supported at the irrelevant maximal ideal, extending a result of Herzog and Sbarra on sequentially Cohen-Macaulay modules. Second, we describe the cone of local cohomology tables of modules with sufficiently high E-depth, building on previous work of the second author and Smirnov. Finally, we obtain a non-Artinian version of a socle-lemma proved by Kustin and Ulrich.

Additional details

Identifiers

URL
http://hdl.handle.net/11567/1067842
URN
urn:oai:iris.unige.it:11567/1067842

Origin repository

Origin repository
UNIGE