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22. Topological Groups, Lie Groups

This volume studies groups equipped with topology and smooth structure.

This volume studies groups equipped with topology and smooth structure. It connects algebra, topology, and geometry, with applications in analysis and physics.

Part I. Topological Groups

Chapter 1. Topological Groups

1.1 Definitions and examples 1.2 Continuity of multiplication and inversion 1.3 Subgroups and quotient groups 1.4 Homomorphisms 1.5 Basic properties

Chapter 2. Fundamental Properties

2.1 Compactness 2.2 Connectedness 2.3 Local compactness 2.4 Separation axioms 2.5 Examples

Chapter 3. Haar Measure

3.1 Invariant measures 3.2 Existence and uniqueness 3.3 Integration on groups 3.4 Applications 3.5 Examples

Part II. Lie Groups

Chapter 4. Smooth Manifolds

4.1 Differentiable manifolds 4.2 Charts and atlases 4.3 Smooth maps 4.4 Tangent spaces 4.5 Examples

Chapter 5. Lie Groups

5.1 Definition 5.2 Matrix Lie groups 5.3 Examples 5.4 Subgroups and quotients 5.5 Basic properties

Chapter 6. Lie Algebras

6.1 Tangent space at identity 6.2 Lie bracket 6.3 Exponential map 6.4 Examples 6.5 Structure

Part III. Structure Theory

Chapter 7. Subgroups and Homomorphisms

7.1 Closed subgroups 7.2 Lie subgroups 7.3 Homomorphisms 7.4 Quotient groups 7.5 Applications

Chapter 8. Representations of Lie Groups

8.1 Linear representations 8.2 Irreducible representations 8.3 Examples 8.4 Applications 8.5 Connections

Chapter 9. Compact Lie Groups

9.1 Structure theory 9.2 Maximal tori 9.3 Weyl groups (overview) 9.4 Classification (overview) 9.5 Applications

Part IV. Advanced Lie Theory

Chapter 10. Semisimple Lie Groups

10.1 Definitions 10.2 Lie algebra decomposition 10.3 Root systems (overview) 10.4 Cartan subalgebras 10.5 Applications

Chapter 11. Representation Theory

11.1 Highest weight theory (overview) 11.2 Characters 11.3 Induced representations 11.4 Harmonic analysis 11.5 Applications

Chapter 12. Symmetric Spaces

12.1 Definitions 12.2 Examples 12.3 Classification (overview) 12.4 Geometric properties 12.5 Applications

Part V. Topological and Analytical Methods

Chapter 13. Harmonic Analysis on Groups

13.1 Fourier analysis on groups 13.2 Representations and decomposition 13.3 Applications 13.4 Examples 13.5 Connections

Chapter 14. Fiber Bundles and Connections

14.1 Principal bundles 14.2 Associated bundles 14.3 Connections and curvature 14.4 Gauge theory (overview) 14.5 Applications

Chapter 15. Lie Group Actions

15.1 Group actions on manifolds 15.2 Orbits and stabilizers 15.3 Homogeneous spaces 15.4 Applications 15.5 Examples

Part VI. Infinite-Dimensional and Generalizations

Chapter 16. Infinite-Dimensional Lie Groups

16.1 Definitions 16.2 Examples 16.3 Functional analytic aspects 16.4 Applications 16.5 Challenges

Chapter 17. Algebraic Groups (Overview)

17.1 Definitions 17.2 Examples 17.3 Structure theory 17.4 Applications 17.5 Connections

Chapter 18. Quantum Groups (Overview)

18.1 Basic concepts 18.2 Deformations 18.3 Representations 18.4 Applications 18.5 Connections

Part VII. Applications

Chapter 19. Physics Applications

19.1 Symmetry in mechanics 19.2 Quantum mechanics 19.3 Gauge theories 19.4 Relativity 19.5 Applications

Chapter 20. Geometry Applications

20.1 Transformation groups 20.2 Homogeneous geometry 20.3 Differential geometry links 20.4 Applications 20.5 Examples

Chapter 21. Computational Aspects

21.1 Numerical methods 21.2 Symbolic computation 21.3 Representation algorithms 21.4 Software tools 21.5 Applications

Part VIII. Research Directions

Chapter 22. Advanced Topics

22.1 Representation theory developments 22.2 Geometric analysis 22.3 Noncommutative geometry 22.4 Topological methods 22.5 Emerging areas

Chapter 23. Open Problems

23.1 Classification challenges 23.2 Representation theory gaps 23.3 Analytical difficulties 23.4 Computational challenges 23.5 Future directions

Chapter 24. Historical and Conceptual Notes

24.1 Development of Lie theory 24.2 Key contributors 24.3 Evolution of ideas 24.4 Cross-disciplinary impact 24.5 Summary

Appendix

A. Standard Lie groups reference B. Key theorems summary C. Proof techniques checklist D. Computational tools E. Cross-reference to other MSC branches

This volume develops topological and Lie groups as the mathematics of continuous symmetry. It connects algebra, geometry, and analysis through smooth and topological structure.