Solutions D Hints and Answers to Selected Exercises
I Basics
1 Preliminaries
1.4 Exercises
Warm-up
1.4.2.
1.4.6.
1.4.10.
1.4.14.
More Exercises
1.4.18.
1.4.20.
1.4.22.
1.4.24.
1.4.28.
2 The Integers
2.4 Exercises
2.4.1.
2.4.3.
2.4.9.
2.4.11.
2.4.17. Fibonacci Numbers.
2.4.19.
2.4.23.
2.4.27.
2.4.29.
II Algebra
3 Groups
3.5 Exercises