Results 31 to 40 of about 1,228,075 (363)

Calculation of the Hidden Symmetry Operator in PT-Symmetric Quantum Mechanics [PDF]

, 2002
In a recent paper it was shown that if a Hamiltonian H has an unbroken PT symmetry, then it also possesses a hidden symmetry represented by the linear operator C. The operator C commutes with both H and PT.
Bender C M, Bender C M, Carl M Bender, Dorey P, Dorey P, Japaridze G S, Mostafazadeh A, Mostafazadeh A, Peter N Meisinger, Qinghai Wang, Ramirez A, Trinh D T, Znojil M   +12 more
core   +2 more sources

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, Jochen Glück, James B. Kennedy   +2 more
openaire   +3 more sources

Weighted arithmetic–geometric operator mean inequalities

Journal of Inequalities and Applications, 2018
In this paper, we refine and generalize some weighted arithmetic–geometric operator mean inequalities due to Lin (Stud. Math. 215:187–194, 2013) and Zhang (Banach J. Math. Anal. 9:166–172, 2015) as follows: Let A and B be positive operators.
Jianming Xue
doaj   +1 more source

On stability analysis and existence of positive solutions for a general non-linear fractional differential equations

, 2020
In this article, we deals with the existence and uniqueness of positive solutions of general non-linear fractional differential equations (FDEs) having fractional derivative of different orders involving p-Laplacian operator.
A. Devi, Anoop Kumar, D. Baleanu, Aziz Khan   +3 more
semanticscholar   +1 more source

New Refinement of the Operator Kantorovich Inequality

Mathematics, 2019
We focus on the improvement of operator Kantorovich type inequalities. Among the consequences, we improve the main result of the paper [H.R. Moradi, I.H. Gümüş, Z.
Hamid Reza Moradi, Shigeru Furuichi, Zahra Heydarbeygi   +2 more
doaj   +1 more source

Moment problems for operator polynomials

, 2012
We extend Haviland's theorem on the integral representation of positive linear functionals on usual (real multivariate) polynomials to the integral representation of positive linear maps on operator polynomials mapping into the space of operators.
Aljaž Zalar, Ambrozie, Berberian, Cimprič, Cimprič, Conway, Dette, Dobrakov, Dobrakov, Dritschel, Durán, Hol, Jacobi, Jaka Cimprič, Klep, Kovalishina, Krein, Li, Marshall, Powers, Putinar, Putinar, Putinar, Riesz, Rosenblatt, Rosenblum, Schmüdgen, Schmüdgen, Schmüdgen, Vasilescu   +29 more
core   +1 more source

On an approximating linear positive operator of Cheney-Sharma

Journal of Numerical Analysis and Approximation Theory, 1997
Not available.
D. D. Stancu, C. Cismașiu
doaj   +2 more sources

The Strong Approximation by Linear Positive Operator In terms of the Averaged Modulus of Order One [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2014
In this work, we introduceBernst-ein linear positive operatorsB_(n,k) (f,x) in the space of all continuous functionsC_I where I=[0,1] with some properties of this operator so to find the strongapproxi- mation of continuous functions with the averaged ...
Zainab Esa Abdul Naby
doaj   +1 more source

Tight informationally complete quantum measurements [PDF]

, 2006
We introduce a class of informationally complete positive-operator-valued measures which are, in analogy with a tight frame, "as close as possible" to orthonormal bases for the space of quantum states. These measures are distinguished by an exceptionally
A J Scott, Appleby D M, Bannai E, Bannai E, Barnum H, Busch P, Casazza P G, Casazza P G, Christensen O, Colin S, Conway J H, D'Ariano G M, Dankert C Cleve R Emerson J Livine E, Daubechies I, Davies E B, Delsarte P, Flammia S T, Fuchs C A, Godsil C Roy A, Grassl M, Hardin R H, Hoggar S G, Hoggar S G, Holevo A S, Horn R T, Ivanović I D, Kaiser G, Klappenecker A, Klappenecker A Rötteler M, Kraus K, König H, König R, Levenshtein V, Li S D, Neumaier A, Nielsen M A, Nikova S, Paris M, Renes J M, Rosenberg M, Rungta P, Scott A J Walgate J Sanders B C, Zauner G   +42 more
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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 ...
openaire   +2 more sources