Acknowledgments
1. Galois 2. Influence of Lagrange 3. Quadratic equations 4.1700 B.c. to A.D. 1500 5. Solution of cubic 6. Solution of quartic 7.Impossibility of quintic 8. Newton 9. Symmetric polynomials in roots10. Fundamental theorem on symmetric polynomials 11. Proof 12.Newtons theorem 13. Discriminants
First Exercise Set 13
14. Solution of cubic 15. Lagrange and Vandermonde 16. Lagrangeresolvents 17. Solution of quartic again 18. Attempt at quintic 19.Lagranges Rdflexions
Second Exercise Set 22
20. Cyclotomic equations 21. The cases n = 3, 5 22. n = 7, 11 23.General case 24. Two lemmas 25.Gausss method 26. p-gons byruler and compass 27. Summary Third Exercise Set 31
28. Resolvents 29. Lagranges theorem 30. Proof 31. Galois resolvents 32. Existence of Galois resolvents 33. Representation of thesplitting field as K(t) 34. Simple algebraic extensions 35. Euclideanalgorithm 36. Construction of simple algebraic extensions 37. Galoismethod
Fourth Exercise Set 45
38. Review 39. Finite permutation groups 40. Subgroups, normalsubgroups 41. The Galois group of an equation 42. Examples
Fifth Exercise Set 56
3. Solvability by radicals 44. Reduction of the Galois group by a cyclicextension 5. Solvable groups 46. Reduction to a normal subgroup ofindex p 47. Theorem on solution by radicals (assuming roots of unity)48. Summary
Sixth Exercise Set 65
49. Splitting fields 50. Fundamental theorem of algebra (so-called) 51.
Construction of a splitting field 52. Need for a factorization method 53.Three theorems on factorization methods 54. Uniqueness offactorizationof polynomials 55. Factorization over 56. Over 57. Gaussslemma, factorization over 58. Over transcendental extensions 59.
Of polynomials in two variables 60. Over algebraic extensions 61. Finalremarks
Seventh Exercise Set 81
62. Review of Galois theory 63. Fundamental theorem of Galois theory(so-called) 64. Galois group of xp - 1 = 0 over 65. Solvability of the cyclotomic equation 6. Theorem on solution by radicals 67. Equations with literal coefficients 68. Equations of prime degree 69.
Galois group of xn - 1 = 0 over 70. Proof of the main proposition 71. Deduction of Lemma 2 of 24
Eighth Exercise Set 97
Appendix 1. Memoir on the Conditions for Solvability of Equations by Radicals, by Evariste Galois
Appendix 2. Synopsis
Appendix 3. Groups
Answers to Exercises
List of Exercises
References
Index
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