Communications in Algebra gives the reader access to the competitively rapid publication of important articles of timely and enduring interest that have made this journal the premier international forum for the exchange of keystone algebraic ideas. Topics covered include nonexistent cycles, comma categories in representation theory, automorphisms of enveloping algebra, Engel margins in metabelian groups, and much more. No personal or institutional mathematics library can afford to be without this consistently superior, undeniably influential, on-going presentation of current interests and activities.