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The theory of R-trees is a well-established and important area of geometric group theory and in this book the authors introduce a construction that provides a new perspective on group actions on R-trees. They construct a group RF(G), equipped with an action on an R-tree, whose elements are certain functions from a compact real interval to the group G. They also study the structure of RF(G), including a detailed description of centralizers of elements and an investigation of its subgroups and quotients. Any group acting freely on an R-tree embeds in RF(G) for some choice of G. Much remains to be done to understand RF(G), and the extensive list of open problems included in an appendix could potentially lead to new methods for investigating group actions on R-trees, particularly free actions. This book will interest all geometric group theorists and model theorists whose research involves R-trees.
The hilarious prequel to Elliot Tiber's bestseller Taking Woodstock, the book upon which Ang Lee's movie was based. By turns comic and tragic, this memoir gives readers a more intimate look at the man who went on to fight at Stonewall and who helped give birth to the Woodstock Nation.
South Carolina's rich flora includes more than 680 species of wildflowers and an abundance of prime viewing locations. South Carolina Trees and Wildflowers highlights over 140 familiar species with intricate detailed illustrations. This lightweight pocket-sized, folding guide identifies familiar trees, shrubs and wildflowers. Seasonal visitors to the state and year round residents will appreciate the map featuring prominent state-wide botanical sanctuaries. Laminated for durability, it is your perfect travel companion as you admire South Carolina's beauty.
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