Tree Lattices

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The book explores group actions on trees, offering a geometric perspective on combinatorial group theory, particularly concerning free groups, amalgams, and HNN extensions. It focuses on "tree lattices," which are discrete groups acting on locally finite trees, and examines their parallels and differences with Lie groups. The authors provide a comprehensive overview of uniform and non-uniform tree lattices, highlighting complex examples and new phenomena unique to this study. This resource is aimed at researchers and can serve as a graduate course text in geometric group theory.