Summary: Journal of Algebra



COHOMOLOGY OPERATORS DEFINED BY A DEFORMATION



LUCHEZAR L. AVRAMOV AND LI-CHUAN SUN



Introduction

A lot of (co)homological information on modules over a commutative ring R is *
*en-
coded in terms of composition products of various Extand Tormodules. Two main
difficulties in using this information are that the resulting algebra and modul*
*e struc-
tures are seldom finite, and the products are almost never commutative. One sig*

Source: Avramov, Luchezar L.- Department of Mathematics, University of Nebraska-Lincoln

Collections: Mathematics