Find an example showing that the finiteness condition in Proposition 4.3 (vii) or Lemma 4.9 is essential.

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Find an example showing that the finiteness condition in Proposition 4.3 (vii) or Lemma 4.9 is essential.

[ use Lebesgue measure or the counting measure on infinite tails \([k, \infty) \downarrow \emptyset\).]

Data from proposition 4.3

Then (i) An B=0 (AUB) = (A) +(B) (A)  p(B) (ii) ACB (iii) ACB, (A)

Data from lemma 4.9

Let (X, A) be a measure space and u: A [0, ) be an additive set function such that (0) = 0 and (A)

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