Show that a Hilbert space (mathcal{H}) is separable if, and only if, (mathcal{H}) contains a countable maximal
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Show that a Hilbert space \(\mathcal{H}\) is separable if, and only if, \(\mathcal{H}\) contains a countable maximal orthonormal system.
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Data from theorem 2624 Assume that H has a countable maximal ONS say e ...View the full answer
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