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Table of Contents

I: Finite Groups.- 1. Representations of Finite Groups.- 2. Characters.- 3. Examples; Induced Representations; Group Algebras; Real Representations.- 4. Representations of: $$ {mathfrak{S}_d}$$ Young Diagrams and Frobenius’s Character Formula.- 5. Representations of $$ {mathfrak{A}_d}$$ and $$ G{L_2}left( {{mathbb{F}_q}} right)$$.- 6. Weyl’s Construction.- II: Lie Groups and Lie Algebras.- 7. Lie Groups.- 8. Lie Algebras and Lie Groups.- 9. Initial Classification of Lie Algebras.- 10. Lie Algebras in Dimensions One, Two, and Three.- 11. Representations of $$ mathfrak{s}{mathfrak{l}_2}mathbb{C}$$.- 12. Representations of $$ mathfrak{s}{mathfrak{l}_3}mathbb{C},$$ Part I.- 13. Representations of $$ mathfrak{s}{mathfrak{l}_3}mathbb{C},$$ Part II: Mainly Lots of Examples.- III: The Classical Lie Algebras and Their Representations.- 14. The General Set-up: Analyzing the Structure and Representations of an Arbitrary Semisimple Lie Algebra.- 15. $$ mathfrak{s}{mathfrak{l}_4}mathbb{C}$$ and $$ mathfrak{s}{mathfrak{l}_n}mathbb{C}$$.- 16. Symplectic Lie Algebras.- 17. $$ mathfrak{s}{mathfrak{p}_6}mathbb{C}$$ and $$ mathfrak{s}{mathfrak{p}_2n}mathbb{C}$$.- 18. Orthogonal Lie Algebras.- 19. $$ mathfrak{s}{mathfrak{o}_6}mathbb{C},$$$$ mathfrak{s}{mathfrak{o}_7}mathbb{C},$$ and $$ mathfrak{s}{mathfrak{o}_m}mathbb{C}$$.- 20. Spin Representations of $$ mathfrak{s}{mathfrak{o}_m}mathbb{C}$$.- IV: Lie Theory.- 21. The Classification of Complex Simple Lie Algebras.- 22. $$ {g_2}$$and Other Exceptional Lie Algebras.- 23. Complex Lie Groups; Characters.- 24. Weyl Character Formula.- 25. More Character Formulas.- 26. Real Lie Algebras and Lie Groups.- Appendices.- A. On Symmetric Functions.- §A.1: Basic Symmetric Polynomials and Relations among Them.- §A.2: Proofs of the Determinantal Identities.- §A.3: Other Determinantal Identities.- B. On Multilinear Algebra.- §B.1: Tensor Products.- §B.2: Exterior and Symmetric Powers.- §B.3: Duals and Contractions.- C. On Semisimplicity.- §C.1: The Killing Form and Caftan’s Criterion.- §C.2: Complete Reducibility and the Jordan Decomposition.- §C.3: On Derivations.- D. Cartan Subalgebras.- §D.1: The Existence of Cartan Subalgebras.- §D.2: On the Structure of Semisimple Lie Algebras.- §D.3: The Conjugacy of Cartan Subalgebras.- §D.4: On the Weyl Group.- E. Ado’s and Levi’s Theorems.- §E.1: Levi’s Theorem.- §E.2: Ado’s Theorem.- F. Invariant Theory for the Classical Groups.- §F.1: The Polynomial Invariants.- §F.2: Applications to Symplectic and Orthogonal Groups.- §F.3: Proof of Capelli’s Identity.- Hints, Answers, and References.- Index of Symbols.