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

13.13.1 problem Example 2
13.13.2 problem 1
13.13.3 problem 2
13.13.4 problem 3
13.13.5 problem 4
13.13.6 problem 5
13.13.7 problem 6
13.13.8 problem 7
13.13.9 problem 9
13.13.10 problem 10