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Covering extended affine Lie algebras and their root systems, this work is intended for graduate students, research mathematicians, and mathematical physicists interested in Lie theory.

A champion tree is the largest recorded tree of its species. In this book, R. Bruce Allison takes us on a tour of Wisconsin's champion trees. Champion trees have been officially recorded in the state since1941. This book contains the location and measurements of 153 species of Wisconsin champion trees. Here is a guide and a challenge to all Wisconsin big-tree hunters to seek and nominate new record trees.