TY - BOOK AU - Huang,Jing-Song AU - Pandžić,Pavle ED - SpringerLink (Online service) TI - Dirac Operators in Representation Theory T2 - Mathematics: Theory & Applications SN - 9780817644932 U1 - 512.55 23 PY - 2006/// CY - Boston, MA PB - Birkhäuser Boston KW - MATHEMATICS KW - GROUP THEORY KW - TOPOLOGICAL GROUPS KW - OPERATOR THEORY KW - GLOBAL DIFFERENTIAL GEOMETRY KW - MATHEMATICAL PHYSICS KW - TOPOLOGICAL GROUPS, LIE GROUPS KW - GROUP THEORY AND GENERALIZATIONS KW - DIFFERENTIAL GEOMETRY KW - MATHEMATICAL METHODS IN PHYSICS N1 - Lie Groups, Lie Algebras and Representations -- Clifford Algebras and Spinors -- Dirac Operators in the Algebraic Setting -- A Generalized Bott-Borel-Weil Theorem -- Cohomological Induction -- Properties of Cohomologically Induced Modules -- Discrete Series -- Dimensions of Spaces of Automorphic Forms -- Dirac Operators and Nilpotent Lie Algebra Cohomology -- Dirac Cohomology for Lie Superalgebras N2 - This monograph presents a comprehensive treatment of important new ideas on Dirac operators and Dirac cohomology. Dirac operators are widely used in physics, differential geometry, and group-theoretic settings (particularly, the geometric construction of discrete series representations). The related concept of Dirac cohomology, which is defined using Dirac operators, is a far-reaching generalization that connects index theory in differential geometry to representation theory. Using Dirac operators as a unifying theme, the authors demonstrate how some of the most important results in representation theory fit together when viewed from this perspective. Key topics covered include: * Proof of Vogan's conjecture on Dirac cohomology * Simple proofs of many classical theorems, such as the Bott-Borel-Weil theorem and the Atiyah-Schmid theorem * Dirac cohomology, defined by Kostant's cubic Dirac operator, along with other closely related kinds of cohomology, such as n-cohomology and (g,K)-cohomology * Cohomological parabolic induction and $A_q(\lambda)$ modules * Discrete series theory, characters, existence and exhaustion * Sharpening of the Langlands formula on multiplicity of automorphic forms, with applications * Dirac cohomology for Lie superalgebras An excellent contribution to the mathematical literature of representation theory, this self-contained exposition offers a systematic examination and panoramic view of the subject. The material will be of interest to researchers and graduate students in representation theory, differential geometry, and physics UR - http://dx.doi.org/10.1007/978-0-8176-4493-2 ER -