Results 221 to 230 of about 1,117 (243)

Unitary extensions of partial isometries

Mathematische Nachrichten, 2011
Let \((A,B)\) be a pair of partial isometries with domains \(\mathcal D_A\), \(\mathcal D_B\) and ranges \(\mathcal R_A\), \(\mathcal R_B\), respectively, closed subspaces of a Hilbert space \(\mathcal H\). A commuting unitary extension of \((A,B)\) is a pair \((\widetilde{A},\widetilde{B})\) of commuting unitary operators \(\widetilde{A}\) and ...
Amoretti, Nieves, Domínguez, Marisela
openaire   +1 more source

On a Generalization of Partial Isometries in Banach Spaces

gmj, 2008
Abstract This paper is concerned with the definition and study of semipartial isometries on Banach spaces. This class of operators, which is a natural generalization of partial isometries from Hilbert to general Banach spaces, contains in particular the class of partial isometries recently introduced by M. Mbekhta [Acta Sci.
openaire   +2 more sources

An optimal perturbation bound for the partial isometry associated to the generalized polar decomposition

Applied Mathematics and Computation, 2020
Qingxiang Xu, Chunhong Fu
exaly  

Partial isometries and generalized inverses of linear relations

Acta Scientiarum Mathematicarum, 2023
Zied Garbouj
exaly  

Partial isometries

1974
openaire   +1 more source

The Structure of Partial Isometries

2009
Peter Hines, Samuel L. Braunstein
openaire   +1 more source

Generalized multidimensional scaling: A framework for isometry-invariant partial surface matching

Proceedings of the National Academy of Sciences of the United States of America, 2006
Michael Bronstein, Ron Kimmel, Kimmel Ron   +2 more
exaly  

Finding isometry groups in theory and practice

General Relativity and Gravitation, 1992
Tevian Dray, Dray Tevian
exaly  

Quantum Isometry Groups: Examples and Computations

Communications in Mathematical Physics, 2008
Debashish Goswami, Goswami Debashish
exaly  

Partial isometries

2017
openaire   +1 more source