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| ``Subscripts''
by sgraves on 2006-07-28 10:31:58 |
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| Need the subscripts of the delta be integers? Take the case of an orthonormal set in a Hilbert space: U=\{u_\alpha|\alpha\in A\} for some index set A, with U orthonormal iff (u_\alpha,u_\beta)=\delta_{\alpha~\beta}.
~sjg |
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