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