13 Section 2.8.1, Singular points, Euler equations. Page 201

13.1 problem Example 2
13.2 problem 1
13.3 problem 2
13.4 problem 3
13.5 problem 4
13.6 problem 5
13.7 problem 6
13.8 problem 7
13.9 problem 9
13.10 problem 10