Consider ((mathbb{R}, mathscr{B}(mathbb{R}))) and (u: mathbb{R} ightarrow mathbb{R}). Show that ({x} in sigma(u)) for all (x in
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Consider \((\mathbb{R}, \mathscr{B}(\mathbb{R}))\) and \(u: \mathbb{R} ightarrow \mathbb{R}\). Show that \(\{x\} \in \sigma(u)\) for all \(x \in \mathbb{R}\) if, and only if, \(u\) is injective.
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Assume first that u is injective This means that every point in the r...View the full answer
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