Nuclear operators between Banach spaces: Difference between revisions

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On Banach spaces: I dared to make change described in talk page. Could be wrong.
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:<math>\mathcal{L}:\mathcal{H} \to \mathcal{H}</math>
 
is [[compact operator|compact]] if and only if it can be written in the form{{Citation needed|date=September 2011}}
 
:<math>\mathcal{L} = \sum_{n=1}^N \rho_n \langle f_n, \cdot \rangle g_n</math>