# Symmetry : An Introduction to Group Theory and Its Applications

## Roy McWeeny

Yayınevi: Dover Publications

Yayın tarihi: 06/2002

ISBN: 9780486421827

İngilizce | 248 Sayfa | 141 mm x 216 mm

• Temin Süresi 49 - 70 iş günü

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This well-organized volume develops the elementary ideas of both group theory and representation theory in a progressive and thorough fashion. Designed to allow students to focus on any of the main fields of application, it is geared toward advanced undergraduate and graduate physics and chemistry students.

Preface
Chapter 1. Groups
1.1 Symbols and the group property
1.2 Definition of a group
1.3 The multiplication table
1.4 Powers, products, generators
1.5 Subgroups, cosets, classes
1.6 Invariant subgroups. The factor group
1.7 Homomorphisms and isomorphisms
1.8 Elementary concept of a representation
1.9 The direct product
1.10 The algebra of a group
Chapter 2. Lattices and vector spaces
2.1 Lattices. One dimension
2.2 Lattices. Two and three dimensions
2.3 Vector spaces
2.4 n-Dimensional space. Basis vectors
2.5 Components and basis changes
2.6 Mappings and similarity transformations
2.7 Representations. Equivalence
2.8 Length and angle. The metric
2.9 Unitary transformations
2.10 Matrix elements as scalar products
2.11 The eigenvalue problem
Chapter 3. Point and space groups
3.1 Symmetry operations as orthogonal transformations
3.2 The axial point groups
3.3 The tetrahedral and octahedral point groups
3.4 Compatibility of symmetry operations
3.5 Symmetry of crystal lattices
3.6 Derivation of space groups
Chapter 4. Representations of point and translation groups
4.1 Matrices for point group operations
4.2 Nomenclature. Representations
4.3 Translation groups. Representations and reciprocal space
Chapter 5. Irreducible representations
5.1 Reducibility. Nature of the problem
5.2 Reduction and complete reduction. Basic theorems
5.3 The orthogonality relations
5.4 Group characters
5.5 The regular representation
5.6 The number of distinct irreducible representations
5.7 Reduction of representations
5.8 Idempotents and projection operators
5.9 The direct product
Chapter 6. Applications Involving Algebraic Forms
6.1 Nature of applications
6.2 Invariant forms. Symmetry restrictions
6.3 Principal axes. The eigenvalue problem
6.4 Symmetry considerations
6.5 Symmetry classification of molecular vibrations
6.6 Symmetry coordinates in vibration theory
Chapter 7. Applications involving functions and operators
7.1 Transformation of functions
7.2 Functions of Cartesian coordinates
7.3 Operator equations. Invariance
7.4 Symmetry and the eigenvalue problem
7.5 Approximation methods. Symmetry functions
7.6 Symmetry functions by projection
7.7 Symmetry functions and equivalent functions
7.8 Determination of equivalent functions
Chapter 8. Applications involving tensors and tensor oper
8.1 Scalar, vector and tensor properties
8.2 Significance of the metric
8.3 Tensor properties. Symmetry restrictions
8.4 Symmetric and antisymmetric tensors
8.5 Tensor fields. Tensor operators
8.6 Matrix elements of tensor operators
8.7 Determination of coupling coefficients
Appendix 1. Representations carried by harmonic functions
Appendix 2. Alternative bases for cubic groups
Index

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