On the Uniqueness of a Minimal Norm Representative of an Operator in the Commutant of the Compressed Shift
Author(s)
Foias, Ciprian
Tannenbaum, Allen R.
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Abstract
In this note we give a new criterion guaranteeing the uniqueness
of a minimal norm representative of a bounded linear operator which commutes
with a finite multiplicity shift. We moreover give examples which show
that if the hypotheses of our theorem are violated then the minimal norm
representative may not be unique.
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Date
1987-12
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Article