Solution to 7.1
Solution to 7.5
Solution to 7.6
Solution to 7.7
Solution to 7.8
(A quick question about pb. 7.3) Is it sufficient if we show that $ f \in L^{r} $? (Jin) And I think I can prove that $ f \in L^{r} $ even though $ f \notin L^{r} $
