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1. Introduction
2. Unique Factorization and the GCD 3. Congruences and the Ring Zin 4. Primitive Roots and the Group Um 5. Quadratic Residues 6. Number-Theoretic Functions and the Distribution of Primes 7. Sums of Squares 8. Quadratic Equations and Quadratic Fields 9. Diophantine Approximation |