Some explicit formulae for the singular values of certain hankel operators with factorizable symbol
Tannenbaum, Allen R.
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In this paper a determinantal formula is written that allows one to compute the singular values of Hankel operators, the L∞ -symbols of which are of the form mw for WE H∞ rational and mE H∞ inner. (All of the Hardy spaces are defined on the unit circle in the usual way.) This is related, moreover, to some problems from control and systems theory.