This two-volume graduate textbook gives a comprehensive,
state-of-the-art account of describing large subgroups of the unit
group of the integral group ring of a finite group and, more
generally, of the unit group of an order in a finite dimensional
semisimple rational algebra. Since the book is addressed to
graduate students as well as young researchers, all required
background on these diverse areas, both old and new, is included.
Supporting problems illustrate the results and complete some of the
proofs. Volume 1 contains all the details on describing generic
constructions of units and the subgroup they generate. Volume 2
mainly is about structure theorems and geometric methods. Without
being encyclopaedic, all main results and techniques used to
achieve these results are included. Basic courses in group theory,
ring theory and field theory are assumed as background.
General
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