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Weird. Apparently the omission of these two apostrophes caused the whole subsequent word to be subscripted. Problem fixed, I hope. |
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:<math> f \mapsto f(x) </math>
is norm-continuous for any element ''x'' of ''X''. By the [[Riesz representation theorem]], this implies that there exists an element ''K''<sub>''x''</sub> of ''H'' such that
:<math> f(x) = \langle K_x, f \rangle </math>
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