Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Constantinescu, Tiberiu"'
We give an explicit and versatile parametrization of all positive selfadjoint extensions of a densely defined, closed, positive operator. In addition, we identify the Friedrichs extension by specifying the parameter to which it corresponds. This is a
Externí odkaz:
http://arxiv.org/abs/1807.05363
This work provides a parametrization of the set of purifications of a 2x2 mixed state, and joint purifications (if any) of a given pair of mixed 2x2 states. The former is parametrized by SO(3, R), while the latter is parametrized by SO(2,R), except w
Externí odkaz:
http://arxiv.org/abs/quant-ph/0210091
Publikováno v:
Commun. Math. Phys., 216(2001), 409-430
In this paper we study hermitian kernels invariant under the action of a semigroup with involution. We characterize those hermitian kernels which realize the given action by bounded operators on a Krein space. Applications to the GNS representation o
Externí odkaz:
http://arxiv.org/abs/math/0007183
Publikováno v:
Proceedings of the American Mathematical Society, 2000 Sep 01. 128(9), 2705-2713.
Externí odkaz:
https://www.jstor.org/stable/119873
Publikováno v:
In IFAC Proceedings Volumes April 2003 36(2):301-304
Publikováno v:
In Linear Algebra and Its Applications 2002 343:147-169
Publikováno v:
In Comptes Rendus de l'Academie des Sciences Series I Mathematics 2000 331(10):797-802
Publikováno v:
Journal of Operator Theory, 1992 Oct 01. 28(2), 371-402.
Externí odkaz:
https://www.jstor.org/stable/24714616
Publikováno v:
Journal of Operator Theory, 1993 Jan 01. 29(1), 167-203.
Externí odkaz:
https://www.jstor.org/stable/24714492