TITLE:  Sigma-Injectivity of Modules

SPEAKER:    S. K. Jain

                     Ohio University, Athens

DAY/DATE: FRIDAY, November 16, 2007

TIME:          4:30 P.M.

ROOM:        MW 154

ABSTRACT: A module is called sigma-injective if an arbitrary

direct sum of copies of M is an injective module. Several

characterizations and consequences of a sigma-injective module

are well-known. We provide a new characterization of a module

to be sigma-injective.

(This is a joint work with late K. Beidar, and Ashish Srivastava,

to appear in Proc AMS)