From the reviews: "The authors of this book present an exposition of different methods related to the theory of the lower central series of groups, the dimension subgroups, the augmentation powers and the derived series. ... This book is very useful for future investigations of the lower central series of groups and the dimension subgroups." (Todor Mollov, Zentralblatt MATH, Vol. 1157, 2009) "The focus is primarily on homological, homotopical and combinatorial methods for the study of group rings. ... On the whole, the monograph is a welcome addition for those interested in the various aspects of the study of group rings and their applications. A strong point of the present book ... is the numerous examples given in each chapter either to confirm a certain result or as a counterexample of a result under weaker hypothesis." (L. R. Vermani, Mathematical Reviews, Issue 2009 m)

• Lower Central Series.- Dimension Subgroups.- Derived Series.- Augmentation Powers.- Homotopical Aspects.- Miscellanea.