Results 21 to 30 of about 986,527 (283)
Eventually positive semigroups of linear operators
Journal of Mathematical Analysis and Applications, 2016 We develop a systematic theory of eventually positive semigroups of linear operators mainly on spaces of continuous functions. By eventually positive we mean that for every positive initial condition the solution to the corresponding Cauchy problem is positive for large enough time.
Daniel Daners +2 more
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Completely positive linear operators for Banach spaces
International Journal of Mathematics and Mathematical Sciences, 1994 Using ideas of Pisier, the concept of complete positivity is generalized in a different direction in this paper, where the Hilbert space ℋ is replaced with a Banach space and its conjugate linear dual.
Mingze Yang
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The Θ-transformation of certain positive linear operators
International Journal of Mathematics and Mathematical Sciences, 1996 The intention of this paper is to describe a construction method for a new sequence of linear positive operators, which enables us to get a pointwise order of approximation regarding the polynomial summator operators which have best properties of ...
Aleandru Lupaş, Detlef H. Mache
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Extreme Positive Linear Operators.
MATHEMATICA SCANDINAVICA, 1969 Made available in DSpace on 2014-12-09T22:17:41Z (GMT). No. of bitstreams: 1 6808044.pdf: 4439781 bytes, checksum: 3672332eda28f28f87bd9d5ae1b3d9c4 (MD5) Previous issue date: 1967 ; Embargo set by: Seth Robbins for item 61762 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs ; Restricted to ...
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A sequence of positive linear operators
Journal of Numerical Analysis and Approximation Theory, 1995 Not available.
M. Ivan, I. Rașa
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Linear positive operators generated by functions
Journal of Numerical Analysis and Approximation Theory, 1976 Not available.
G.A. Jägers
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On New Classes of Stancu-Kantorovich-Type Operators
Mathematics, 2021 The present paper introduces new classes of Stancu–Kantorovich operators constructed in the King sense. For these classes of operators, we establish some convergence results, error estimations theorems and graphical properties of approximation for the ...
Bianca Ioana Vasian +2 more
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A characterization of positive linear maps and criteria of entanglement for quantum states
, 2010 Let $H$ and $K$ be (finite or infinite dimensional) complex Hilbert spaces. A characterization of positive completely bounded normal linear maps from ${\mathcal B}(H)$ into ${\mathcal B}(K)$ is given, which particularly gives a characterization of ...
Bengtsson I Zyczkowski K +16 more
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New maximum principles for linear elliptic equations
, 2006 We prove extensions of the estimates of Aleksandrov and Bakel$'$man for linear elliptic operators in Euclidean space $\Bbb{R}^{\it n}$ to inhomogeneous terms in $L^q$ spaces for $q < n$.
Kuo, Hung-Ju, Trudinger, Neil S.
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Maps preserving absolute continuity and singularity of positive operators [PDF]
, 2020 In this paper we consider the cone of all positive, bounded operators acting on an infinite dimensional, complex Hilbert space, and examine bijective maps that preserve absolute continuity in both directions.
Gehér, György +2 more
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