This landmark among mathematics texts applies group theory to quantum mechanics, first covering unitary geometry, quantum theory, groups and their representations, then applications themselves — rotation, Lorentz, permutation groups, symmetric permutation groups, and the algebra of symmetric transformations.

Unabridged republication of the English (1931) edition.

Table of Contents for The Theory of Groups and Quantum Mechanics

AUTHOR'S PREFACES
TRANSLATOR'S PREFACE
INTRODUCTION
I. UNITARY GEOMETRY
I. The n-dimensional Vector Space
2. Linear Correspondences. Matrix Calculus
3. The Dual Vector Space
4. Unitary Geometry and Hermitian Forms
5. Transformation to Principal Axes
6. Infinitesimal Unitary Transformations
7. Remarks on 8-dimensional Space
II. QUANTUM THEORY
1. Physical Foundations
2. The de Broglie Waves of a Particle
3. Schrödinger's Wave Equation. The Harmonic Oscillator
4. Spherical Harmonics
5. Electron in Spherically Symmetric Field. Discretional Quantization
6. Collision Phenomena
7. The Conceptual Structure of Quantum Mechanics
8. The Dynamical Law. Transition Probabilities
9. Peturbation Theory
10. The Problem of Several Bodies. Product Space
11. Commutation Rules. Canonical Transformations
12. Motion of a Particle in an Electro-magnetic Field. Zeeman Effect and Stark Effect
13. Atom in Interatction with Radiation
III. GROUPS AND THEIR REPRESENTATIONS
1. Transformation Groups
2. Abstract Groups and their Realization
3. Sub-groups an Conjugate Classes
4. Representation of Groups by Linear Transformations
5. Formal Processes. Clebsch-Gordan Series
6. The Jordan-Hölder Theorem and its Analogues
7. Unitary Representations
8. Rotation and Lorentz Groups
9. Character of a Representation
10. Schur's Lemma and Burnside's Theorem
11. Orthogonality Properties of Group Characters
12. Extension to Closed Continuous Groups
13. The Algebra of a Group
14. Invariants and Covariants
15. Remarks on Lie's Theory of Continuous Groups of Transformations
16. Representation by Rotations of Ray Space
IV. APPLICATION OF THE THEORY OF GROUPS TO QUANTUM MECHANICS
A. The Rotation Group
1. The Representation Induced in System Space by the Rotation Group
2. Simple States and Term Analysis. Examples
3. Selection and Intensity Rules
4. "The Spinning Electron, Multiplet Structure and Anomalous Zeeman Effect"
B. The Lorentz Group
5. Relativistically Invariant Equations of Motion of an Electron
6. Energy and Momentum. Remarks on the Interchange of Past and Future
7. Electron in Spherically Symmetric Field
8. Selection Rules. Fine Structure
C. The Permutation Group
9. Resonance between Equivalent Individuals
10. The Pauli Exclusion Principle and the Structure of the Periodic Table
11. The Problem of Several Bodies and the Quantization of the Wave Equ
12. Quantization of the Maxwell-Dirac Field Equations
13. The Energy and Momentum Laws of Quantum Physics. Relativistic Invariance
D. Quantum Kinematics
14. Quantum Kinematics as an Abelian Group of Rotations
15. Derivation of the Wave Equation from the Commutation Rules
V. THE SYMMETRIC PERMUTATION GROUP AND THE ALGEBRA OF SYMMETRIC TRANSFORMATIONS
A. General Theory
1. The Group induced in Tensor Space and the Algebra of Symmetric Transformations
2. Symmetry Classes of Tensors
3. Invariant Sub-spaces in Group Space
4. Invariant Sub-spaces in Tensor Space
5. Fields and Algebras
6. Representations of Algebras
7. Constructive Reduction of an Algebra into Simple Matric Algebras
B. Extension of the Theory and Physical Applications
8. The Characters of the Symmetric Group and Equivalence Degeneracy in Quantum Mechanics
9. Relation between the Characters of the Symmetric Permutation and Affine Groups
10. Direct Product. Subgroups
11. Perturbation Theory for the Construction of Molecules
12. The Symmetry Problem of Quantum Theory
C. Explicit Algebraic Construction
13. Young's Symmetry Operators
14. "Irreducibility, Linear Independence, Inequivalence and Completeness"
15. Spin and Valence. Group-theoretic Classification of Atomic Spectra
16. Determination of the Primitive Characters of u and p
17. Calculation of Volume on u
18. Branching Laws
APPENDIX
I. PROOF OF AN INEQUALITY
2. A COMPOSITION PROPERTY OF GROUP CHARACTERS
3. A THEOREM CONCERNING NON-DEGENERATE ANTI-SYMMETRIC BI-LINEAR FORMS
BIBLIOGRAPHY
LIST OF OPERATIONAL SYMBOLS
LIST OF LETTERS HAVING A FIXED SIGNIFICANCE
INDEX

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