Zobrazeno 1 - 10
of 70
pro vyhledávání: '"P. Gãvruţã"'
Publikováno v:
Abstract and Applied Analysis, Vol 2012 (2012)
In this paper we prove a fixed-point theorem for a class of operators with suitable properties, in very general conditions. Also, we show that some recent fixed-points results in Brzdęk et al., (2011) and Brzdęk and Ciepliński (2011) can be obtain
Externí odkaz:
https://doaj.org/article/73f02612a4064e44af4f4678e588763b
Publikováno v:
Abstract and Applied Analysis, Vol 2012 (2012)
We investigate the generalized Ulam-Hyers stability of the Cauchy functional equation and pose two open problems in fuzzy Banach space.
Externí odkaz:
https://doaj.org/article/f0a4b6b72e654b11ad0ef7ed582cab5e
Autor:
Gavruta, Pasc, Manolescu, Laura
In this paper, we give new results concerning the existence of Picard operators on complete metric spaces.
Comment: 12 pages. Remarks are welcome
Comment: 12 pages. Remarks are welcome
Externí odkaz:
http://arxiv.org/abs/2009.13157
Autor:
Gavruta, Laura
In Bergman and Dirichlet spaces, the shift operator is not an isometry, but it is a left invertible operator. In this paper we give conditions on the left invertible operators such that a operator version, in the sense of Rosenblum and Rovnyak, of th
Externí odkaz:
http://arxiv.org/abs/1704.04200
Autor:
Gavruta, L., Gavruta, P.
Operator-valued frames (or g-frames) are generalizations of frames and fusion frames and have been used in packets encoding, quantum computing, theory of coherent states and more. In this paper, we give a new formula for operator-valued frames for fi
Externí odkaz:
http://arxiv.org/abs/1504.06504
In the present paper, we prove that Z-contractions and weakly type contractions are actually Meir-Keeler contractions.
Comment: 5 pages
Comment: 5 pages
Externí odkaz:
http://arxiv.org/abs/1405.5034
Publikováno v:
Journal of Linear and Topological Algebra, Vol. 04, No. 01, 2015, 25- 34
We give some new results on sparse signal recovery in the presence of noise, for weighted spaces. Traditionally, were used dictionaries that have the norm equal to 1, but, for random dictionaries this condition is rarely satisfied. Moreover, we give
Externí odkaz:
http://arxiv.org/abs/1405.0391
Publikováno v:
J. Phys. A: Math. Theor. 50 165303 (2017)
Inspired by some problems in Quantum Information Theory, we present some results concerning decompositions of positive operators acting on finite dimensional Hilbert spaces. We focus on decompositions by families having geometrical symmetry with resp
Externí odkaz:
http://arxiv.org/abs/1609.05060
In this paper, we introduce (p,q)g-Bessel multipliers in Banach spaces and we show that under some conditions a (p,q)g-Bessel multiplier is invertible. Also, we show the continuous dependency of (p,q)g-Bessel multipliers on their parameters.
Com
Com
Externí odkaz:
http://arxiv.org/abs/1501.01146
Autor:
Constantin, Olivia, Gavruta, Laura
We remark that a dyadic version of the Carleson embedding theorem for the Bergman space extends to vector-valued functions and operator-valued measures. This is in contrast to a result by Nazarov, Treil, Volberg in the context of the Hardy space. We
Externí odkaz:
http://arxiv.org/abs/1409.3810