books.google.cl - In this graduate textbook Professor Humphreys presents a concrete and up-to-date introduction to the theory of Coxeter groups. He assumes that the reader has a good knowledge of algebra, but otherwise the book is self contained. The first part is devoted to establishing concrete examples; the author...http://books.google.cl/books/about/Reflection_Groups_and_Coxeter_Groups.html?hl=es&id=ODfjmOeNLMUC&q=irreducible&utm_source=gb-gplus-shareReflection Groups and Coxeter Groups
