Let (mu, u) be (sigma)-finite measures on ((mathbb{R}, mathscr{B}(mathbb{R}))). Show that (i) The set (D:={x in mathbb{R}:
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Let \(\mu, u\) be \(\sigma\)-finite measures on \((\mathbb{R}, \mathscr{B}(\mathbb{R}))\). Show that
(i) The set \(D:=\{x \in \mathbb{R}: \mu\{x\}>0\}\) is at most countable.
(ii) The diagonal \(\Delta \subset \mathbb{R}^{2}\) has measure \(\mu \times u(\Delta)=\sum_{x \in D} \mu\{x\} u\{x\}\).
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i ii Data from theorem 145 Since is ofinite there is an exhausting seque...View the full answer
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