1. One can find the proof of the Measurable Projection and Selection Theorems in the following notes: Download

2. On page 564 the square root of *n* in the estimation is in a wrong place.

3. On page 567 in the definition of *T* in the index one should write *n*.

4. On page 568 it is perhaps more consistent to write

Also it is perhaps a bit clearer and a bit more precise if in the middle of the page we first change to

and in the next line we say that: ...In a similar way, using

one can prove that...