This volume is a collection of 19 papers presented during the 28th Latin American Algebra Colloquium held in Sao Pedro, Brazil, in August 2009. Topics include: globalization theorems for partial Hopf (co)actions and some applications, Nichols algebras associated to simple racks, classification of irreducible representations over finite simple Lie conformal superalgebras, hereditary torsion theories, a survey of partial actions, free associative algebras linearly graded by finite groups, and more. No background information is given for editor Milies. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)