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A Spinorial Approach to Riemannian and Conformal Geometry
EMS Monographs in Mathematics

Jean-Pierre Bourguignon (IHÉS, Bures-sur-Yvette, France)
Oussama Hijazi (Université de Lorraine, Nancy, France)
Jean-Louis Milhorat (Université de Nantes, France)
Andrei Moroianu (Université de Versailles-St Quentin, France)
Sergiu Moroianu (Institutul de Matematică al Academiei Române, București, Romania)

A Spinorial Approach to Riemannian and Conformal Geometry

ISBN print 978-3-03719-136-1, ISBN online 978-3-03719-636-6
DOI 10.4171/136
June 2015, 462 pages, hardcover, 16.5 x 23.5 cm.
78.00 Euro

The book gives an elementary and comprehensive introduction to Spin Geometry, with particular emphasis on the Dirac operator which plays a fundamental role in differential geometry and mathematical physics.

After a self-contained presentation of the basic algebraic, geometrical, analytical and topological ingredients, a systematic study of the spectral properties of the Dirac operator on compact spin manifolds is carried out. The classical estimates on eigenvalues and their limiting cases are discussed next, highlighting the subtle interplay of spinors and special geometric structures. Several applications of these ideas are presented, including spinorial proofs of the Positive Mass Theorem or the classification of positive Kähler–Einstein contact manifolds. Representation theory is used to explicitly compute the Dirac spectrum of compact symmetric spaces.

The special features of the book include a unified treatment of Spin$^\mathrm c$ and conformal spin geometry (with special emphasis on the conformal covariance of the Dirac operator), an overview with proofs of the theory of elliptic differential operators on compact manifolds based on pseudodifferential calculus, a spinorial characterization of special geometries, and a self-contained presentation of the representation-theoretical tools needed in order to apprehend spinors.

This book will help advanced graduate students and researchers to get more familiar with this beautiful, though not sufficiently known, domain of mathematics with great relevance to both theoretical physics and geometry.

Keywords: Dirac operator, Penrose operator, Spin geometry, Spinc geometry, conformal geometry, Kähler manifolds, Quaternion-Kähler manifolds, Weyl geometry, representation theory, Killing spinors, eigenvalues

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