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Operator versions of the Kantorovich inequality |
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| Authors: | P. G. Spain |
| Affiliation: | Department of Mathematics, University of Glasgow, Glasgow G12 8QW, Scotland |
| Abstract: | The Operator Kantorovich Inequality
holds for a wide class of operators |
| Keywords: | Kantorovich Inequality Cauchy-Schwarz Inequality |
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on a Hilbert space 
and all operators 
for which ![$[a] , u$](http://www.ams.org/proc/1996-124-09/S0002-9939-96-03424-7/gif-abstract/img7.gif)
is a partial isometry, ![$[a]$](http://www.ams.org/proc/1996-124-09/S0002-9939-96-03424-7/gif-abstract/img8.gif)
being the range projection of 