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"The theory of buildings lies at the interplay between geometry and group theory, and is one of the main tools for studying the structure of many groups. Actually, buildings were introduced by Jacques Tits in the 1950s to better understand and study a semi-simple algebraic group over a field. For a general field, its associated building is a spherical building, called its Tits building. It is a simplicial complex and, in this book, one considers a geometric realization called vectorial building. When the field is real valued, François Bruhat and Jacques Tits constructed another building taking into account the topology of the field. This Bruhat-Tits building is a polysimplicial complex and its usual geometric realization is an affine building. These vectorial or affine buildings are the main examples of Euclidean buildings. The present book develops the general abstract theory of these Euclidean buildings (the buildings with Euclidean affine spaces as apartments). It is largely self-contained and emphasizes the metric aspects of these objects, as CAT(0) spaces very similar to Riemannian symmetric spaces of non-compact type. The book studies their compactifications, their links with groups, many classical examples, and some applications (for example, to Hecke algebras)."--Provided by publisher.
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Ordered algebraic structures --- Buildings (Group theory) --- Global differential geometry --- Finite generalized quadrangles --- Homogeneous spaces. --- Immeubles (Théorie des groupes) --- Géométrie différentielle globale --- Homogeneous spaces --- 512.54 --- 514.7 --- Spaces, Homogeneous --- Lie groups --- Generalized quadrangles, Finite --- Quadrangles, Generalized finite --- Finite geometries --- Geometry, Differential --- Theory of buildings (Group theory) --- Tits's theory of buildings (Group theory) --- Linear algebraic groups --- Groups. Group theory --- Differential geometry. Algebraic and analytic methods in geometry --- 514.7 Differential geometry. Algebraic and analytic methods in geometry --- 512.54 Groups. Group theory --- Immeubles (Théorie des groupes) --- Géométrie différentielle globale --- Global differential geometry. --- Finite generalized quadrangles. --- Immeubles (théorie des groupes) --- Géométrie différentielle globale. --- Quadrangles généralisés. --- Espaces homogènes.
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This book gives the complete classification of Moufang polygons, starting from first principles. In particular, it may serve as an introduction to the various important algebraic concepts which arise in this classification including alternative division rings, quadratic Jordan division algebras of degree three, pseudo-quadratic forms, BN-pairs and norm splittings of quadratic forms. This book also contains a new proof of the classification of irreducible spherical buildings of rank at least three based on the observation that all the irreducible rank two residues of such a building are Moufang polygons. In an appendix, the connection between spherical buildings and algebraic groups is recalled and used to describe an alternative existence proof for certain Moufang polygons.
Moufang loops --- Buildings (Group theory) --- Moufang, Boucles de --- Immeubles (Théorie des groupes) --- Moufang loops. --- Graph theory --- Graph theory. --- Buildings (Group theory). --- Immeubles (Théorie des groupes) --- Geometry. --- Algebra. --- Discrete mathematics. --- Algebraic geometry. --- Group theory. --- Combinatorics. --- Discrete Mathematics. --- Algebraic Geometry. --- Group Theory and Generalizations. --- Combinatorics --- Algebra --- Mathematical analysis --- Groups, Theory of --- Substitutions (Mathematics) --- Algebraic geometry --- Geometry --- Discrete mathematical structures --- Mathematical structures, Discrete --- Structures, Discrete mathematical --- Numerical analysis --- Mathematics --- Euclid's Elements
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This book treats Jacques Tits's beautiful theory of buildings, making that theory accessible to readers with minimal background. It includes all the material of the earlier book Buildings by the second-named author, published by Springer-Verlag in 1989, which gave an introduction to buildings from the classical (simplicial) point of view. This new book also includes two other approaches to buildings, which nicely complement the simplicial approach: On the one hand, buildings may be viewed as abstract sets of chambers with a Weyl-group-valued distance function; this point of view has become increasingly important in the theory and applications of buildings. On the other hand, buildings may be viewed as metric spaces. Beginners can still use parts of the new book as a friendly introduction to buildings, but the book also contains valuable material for the active researcher. There are several paths through the book, so that readers may choose to concentrate on one particular approach. The pace is gentle in the elementary parts of the book, and the style is friendly throughout. All concepts are well motivated. There are thorough treatments of advanced topics such as the Moufang property, with arguments that are much more detailed than those that have previously appeared in the literature. This book is suitable as a textbook, with many exercises, and it may also be used for self-study.
Buildings (Group theory) --- Immeubles (Théorie des groupes) --- Buildings (Group theory). --- Algebra --- Mathematics --- Physical Sciences & Mathematics --- Linear algebraic groups. --- Immeubles (Théorie des groupes) --- EPUB-LIV-FT LIVMATHE LIVSTATI SPRINGER-B --- Theory of buildings (Group theory) --- Tits's theory of buildings (Group theory) --- Algebraic groups, Linear --- Mathematics. --- Algebraic geometry. --- Group theory. --- Topological groups. --- Lie groups. --- Group Theory and Generalizations. --- Algebraic Geometry. --- Topological Groups, Lie Groups. --- Geometry, Algebraic --- Group theory --- Algebraic varieties --- Linear algebraic groups --- Geometry, algebraic. --- Topological Groups. --- Groups, Topological --- Continuous groups --- Algebraic geometry --- Geometry --- Groups, Theory of --- Substitutions (Mathematics) --- Groups, Lie --- Lie algebras --- Symmetric spaces --- Topological groups --- Geometry, Algebraic.
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