Chapter 1.Introduction and motivation
§1.1.Presentation
§1.2.Four motivating statements
§1.3.Prerequisites and notation
Chapter 2.The language of representation theory
§2.1.Basic language
§2.2.Formalism: changing the space
§2.3.Formalism: changing the group
§2.4.Formalism: changing the field
§2.5.Matrix representations
§2.6.Examples
§2.7.Some general results
§2.8.Some Clifford theory
§2.9.Conclusion
Chapter 3.Variants
§3.1.Representations of algebras
§3.2.Representations of Lie algebras
§3.3.Topological groups
§3.4.Unitary representations
Chapter 4.Linear representations of finite groups
§4.1.Maschke's Theorem
§4.2.Applications of Maschke's Theorem
§4.3.Decomposition of representations
§4.4.Harmonic analysis on finite groups
§4.5.Finite abelian groups
§4.6.The character table
§4.7.Applications
§4.8.Further topics
Chapter 5.Abstract representation theory of compact groups
§5.1.An example: the circle group
§5.2.The Haar measure and the regular representation of a locally compact group
§5.3.The analogue of the group algebra
§5.4.The Peter-Weyl Theorem
§5.5.Characters and matrix coefficients for compact groups
§5.6.Some first examples
Chapter 6.Applications of representations of compact groups
§6.1.Compact Lie groups are matrix groups
§6.2.The Frobenius-Schur indicator
§6.3.The Larsen alternative
§6.4.The hydrogen atom
Chapter 7.Other groups: a few examples
§7.1.Algebraic groups
§7.2.Locally compact groups: general remarks
§7.3.Locally compact abelian groups
§7.4.A non-abelian example: SL2(R)
Appendix A.Some useful facts
§A.1.Algebraic integers
§A.2.The spectral theorem
§A.3.The Stone-Weierstrass Theorem
Bibliography