Exer. 9.1
Exer. 9.1, a slightly different approach
Exer. 9.2
Exer. 9.2, more detailed answer
Exer. 9.2, a third answer which claims that the other two are wrong
Exer. 9.3
Exer. 9.4
Exer. 9.5
Exer. 9.5, another solution
Exer. 9.6
Exer. 9.7
Exer. 9.7 another solution
Sec. 9.7 Some more on hyperfunctions
Exer. 9.8
Exer. 9.9
Exer. 9.10
Exer. 9.11
Exer. 9.11 using Penrose's hint
Exer. 9.12
Exer. 9.13
Exer. 9.14
Exer. 9.14 using Penrose's hint