Results 41 to 50 of about 6,405 (199)

On approximation of copulas

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1999
New sufficient conditions for strong approximation of copulas, generated by sequences of partitions of unity, are given. Results are applied to the checkerboard and Bernstein approximations.
Tomasz Kulpa
doaj   +1 more source

Energy preserving evolutions over Bosonic systems [PDF]

open access: yesQuantum
The exponential convergence to invariant subspaces of quantum Markov semigroups plays a crucial role in quantum information theory. One such example is in bosonic error correction schemes, where dissipation is used to drive states back to the code-space –
Paul Gondolf, Tim Möbus, Cambyse Rouzé
doaj   +1 more source

Iterates of Markov operators

open access: yesJournal of Approximation Theory, 1976
AbstractIn this paper we consider iterates of Markov operators of the form Φf(x)=∑j=0mf(jmϕj(x) where the ϑj's are linearly independent, nonnegative and sum to 1. We define the evaluation matrix of Φ to be Φ∗ = [ϑj(im)] and prove that the iterates of the operator converge in the operator norm if and only if the powers of the evaluation matrix converge.
Nielson, G.M   +2 more
openaire   +2 more sources

Mean-field dynamics of open quantum systems with collective operator-valued rates: validity and application

open access: yesNew Journal of Physics, 2023
We consider a class of open quantum many-body Lindblad dynamics characterized by an all-to-all coupling Hamiltonian and by dissipation featuring collective ‘state-dependent’ rates.
Eliana Fiorelli   +3 more
doaj   +1 more source

Markov Property and Cokernels of Local Operators [PDF]

open access: yesJournal of the London Mathematical Society, 1997
Summary: We discuss Gaussian generalized random fields indexed by smooth sections of vector bundles with respect to Markov properties. We propose a new set-up which is suitable for the present question and within which new phenomena are detected naturally.
Iwata, K., Schäfer, J.
openaire   +4 more sources

Indistinguishability Operators Applied to Task Allocation Problems in Multi-Agent Systems

open access: yesApplied Sciences, 2017
In this paper we show an application of indistinguishability operators to model response functions. Such functions are used in the mathematical modeling of the task allocation problem in multi-agent systems when the stimulus, perceived by the agent, to ...
José Guerrero   +3 more
doaj   +1 more source

An Approach of Diagnosis Based On The Hidden Markov Chains Model [PDF]

open access: yesComputer Science Journal of Moldova, 2008
Diagnosis is a key element in industrial system maintenance process performance. A diagnosis tool is proposed allowing the maintenance operators capitalizing on the knowledge of their trade and subdividing it for better performance improvement and ...
Karim Bouamrane   +2 more
doaj  

Continuous selections of Borel measures, positive operators and degenerate evolution problems

open access: yesJournal of Numerical Analysis and Approximation Theory, 2007
In this paper we continue the study of a sequence of positive linear operators which we have introduced in [9] and which are associated with a continuous selection of Borel measures on the unit interval.
Francesco Altomare, Vita Leonessa
doaj   +2 more sources

Perturbation of an α-stable type stochastic process by a pseudo-gradient

open access: yesModern Stochastics: Theory and Applications
A Markov process defined by some pseudo-differential operator of an order $1\lt \alpha \lt 2$ as the process generator is considered. Using a pseudo-gradient operator, that is, the operator defined by the symbol $i\lambda |\lambda {|^{\beta -1}}$ with ...
Mykola Boiko, Mykhailo Osypchuk
doaj   +1 more source

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