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MEASURES OF SYMMETRY FOR CONVEX SETS AND STABILITY IBD

GABOR TOTH
SPRINGER
12 / 2015
9783319237329
Anglès

Sinopsi

This textbook treats two important and related matters in convex geometry: the quantification of symmetry of a convex set-measures of symmetry-and the degree to which convex sets that nearly minimize such measures of symmetry are themselves nearly symmetric-the phenomenon of stability. By gathering the subject?s core ideas and highlights around Grünbaum?s general notion of measure of symmetry, it paints a coherent picture of the subject, and guides the reader from the basics to the state-of-the-art. The exposition takes various paths to results in order to develop the reader?s grasp of the unity of ideas, while interspersed remarks enrich the material with a behind-the-scenes view of corollaries and logical connections, alternative proofs, and allied results from the literature. Numerous illustrations elucidate definitions and key constructions, and over 70 exercises-with hints and references for the more difficult ones-test and sharpen the reader?s comprehension.The presentation includes: a basic course covering foundational notions in convex geometry, the three pillars of the combinatorial theory (the theorems of Carathéodory, Radon, and Helly), critical sets and Minkowski measure, the Minkowski-Radon inequality, and, to illustrate the general theory, a study of convex bodies of constant width, two proofs of F. John?s ellipsoid theorem, a treatment of the stability of Minkowski measure, the Banach-Mazur metric, and Groemer?s stability estimate for the Brunn-Minkowski inequality, important specializations of Grünbaum?s abstract measure of symmetry, such as Winternitz measure, the Rogers-Shepard volume ratio, and Guo?s Lp -Minkowski measure, a construction by the author of a new sequence of measures of symmetry, the kth mean Minkowski measure, and lastly, an intriguing application to the moduli space of certain distinguished maps from a Riemannian homogeneous space to spheres-illustrating the broad mathematical relevance of the book?s subject.

PVP
84,72€