Contents: 1. Mappings And Operations 2. Introduction To Groups 3. Equivalence. Congruence. Divisibility 4. Groups 5. Group Homomorphisms 6. Introduction To Rings 7. The Familiar Number R System 8. Polynomials 9. Quotient Rings 10. Galois Theory: Overview 11. Galois Theory 12. Geometric Constructions 13. Geometric Constructions 14. Applications Of Permutation Groups 15. Symmetry …