Non-Abelian Harmonic Analysis

1. Front Matter

   Pages i-xv

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2. Preliminaries

   • Roger Howe, Eng Chye Tan

   Pages 1-50

3. Representations of the Lie Algebra of SL(2, ℝ)

   • Roger Howe, Eng Chye Tan

   Pages 51-92

4. Unitary Representations of the Universal Cover of SL(2, ℝ)

   • Roger Howe, Eng Chye Tan

   Pages 93-120

5. Applications to Analysis

   • Roger Howe, Eng Chye Tan

   Pages 121-202

6. Asymptotics of Matrix Coefficients

   • Roger Howe, Eng Chye Tan

   Pages 203-242

7. Back Matter

   Pages 243-259

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This book mainly discusses the representation theory of the special linear group 8L(2, 1R), and some applications of this theory. In fact the emphasis is on the applications; the working title of the book while it was being writ­ ten was "Some Things You Can Do with 8L(2). " Some of the applications are outside representation theory, and some are to representation theory it­ self. The topics outside representation theory are mostly ones of substantial classical importance (Fourier analysis, Laplace equation, Huyghens' prin­ ciple, Ergodic theory), while the ones inside representation theory mostly concern themes that have been central to Harish-Chandra's development of harmonic analysis on semisimple groups (his restriction theorem, regularity theorem, character formulas, and asymptotic decay of matrix coefficients and temperedness). We hope this mix of topics appeals to nonspecialists in representation theory by illustrating (without an interminable prolegom­ ena) how representation theory can offer new perspectives on familiar topics and by offering some insight into some important themes in representation theory itself. Especially, we hope this book popularizes Harish-Chandra's restriction formula, which, besides being basic to his work, is simply a beautiful example of Fourier analysis on Euclidean space. We also hope representation theorists will enjoy seeing examples of how their subject can be used and will be stimulated by some of the viewpoints offered on representation-theoretic issues.

• Fourier analysis
• Lie
• Matrix
• algebra
• classification
• eigenvector
• equation
• ergodic theory
• group
• lie algebra
• presentation
• representation theory
• symmetric relation
• themes
• theorem

• Department of Mathematics, Yale University, New Haven, USA

  Roger Howe

• Department of Mathematics, National University of Singapore, Singapore

  Eng Chye Tan