vi Contents
S7. Problems of Section 7 204
S8. Problems of Section 8 204
S9. Problems of Section 9 216
S10. Problems of Section 10 221
S11. Problems of Section 11 224
S12. Problems of Section 12 230
S13. Problems of Section 13 230
S15. Problems of Section 15 234
Appendix A. Elementary Number Theory 237
A.1. Modular arithmetic and rings 237
A.2. Greatest common divisor and unique factorization 239
A.3. Chinese remainder theorem 241
A.4. The structure of finite Abelian groups 243
A.5. The structure of the group
(Z/qZ)∗
245
A.6. Euclid’s algorithm 247
A.7. Continued fractions 248
Bibliography 251
Index 255
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