A Pathway Into Number Theory (Paperback, 2 Revised edition)

Preface to the second edition; Introduction; 1. The fundamental theorem of arithmetic; 2. Modular addition and Euler's Phi function; 3. Modular multiplication; 4. Quadratic residues; 5. The equation xn+yn=zn, for n=2, 3, 4; 6. Sums of squares; 7. Partitions; 8. Quadratic forms; 9. Geometry of numbers; 10. Continued fractions; 11. Approximation of irrationals by rationals; bibliography; Index.