Weak subintegrality and invertible modules in graded rings

Authors
Roberts, LG Singh, B
Citation
Lg. Roberts et B. Singh, Weak subintegrality and invertible modules in graded rings, J ALGEBRA, 237(2), 2001, pp. 657-672
Citations number
7
Categorie Soggetti
Mathematics
Journal title
JOURNAL OF ALGEBRA
ISSN journal
00218693 → ACNP
Volume
237
Issue
2
Year of publication
2001
Pages
657 - 672
Database
ISI
SICI code
0021-8693(20010315)237:2<657:WSAIMI>2.0.ZU;2-R
Abstract
We show that the isomorphism zeta (B/A): B/A --> F(A*, B*) introduced by th e second author for a subintegral extension A subset of or equal to B of po sitively graded rings with A(0) = B-0 is also an isomorphism if A subset of or equal to B is only a weakly subintegral extension. (C) 2001 Academic Pr ess.