LONDON, England, Jan. 12 -- Communications in Algebra published research articles on the following topics in its Vol. 51, No. 2 edition:

Articles:

* Trace ideals of semidualizing modules and two generalizations of nearly Gorenstein rings

* Symmetry on zero and idempotents

* Extra-special p-groups as groups of automorphisms

* On shifted principles for attached primes of the Artinian cofinite top local cohomology modules