Results 11 to 20 of about 2,003,104 (241)

The induced generalized OWA operator (WP) [PDF]

open access: yes, 2013
[spa] Se presenta el operador OWA generalizado inducido (IGOWA). Es un nuevo operador de agregación que generaliza al operador OWA a través de utilizar las principales características de dos operadores muy conocidos como son el operador OWA generalizado ...
Merigó Lindahl, José M.   +1 more
core   +7 more sources

The generalized index of maximum and minimum level and its application in decision making [PDF]

open access: yes, 2013
[spa] El índice del máximo y el mínimo nivel es una técnica muy útil, especialmente para toma de decisiones, que usa la distancia de Hamming y el coeficiente de adecuación en el mismo problema.
Merigó Lindahl, José M.   +1 more
core   +7 more sources

Schrödinger operators with δ and δ′-potentials supported on hypersurfaces [PDF]

open access: yes, 2013
Self-adjoint Schrödinger operators with δ and δ′-potentials supported on a smooth compact hypersurface are defined explicitly via boundary conditions.
Lotoreichik, Vladimir   +2 more
core   +4 more sources

The operator algebra generated by the translation, dilation and multiplication semigroups [PDF]

open access: yesJournal of Functional Analysis, 2015
The weak operator topology closed operator algebra on $L^2(\bR)$ generated by the one-parameter semigroups for translation, dilation and multiplication by $e^{i\lambda x}, \lambda \geq 0,$ is shown to be a reflexive operator algebra, in the sense of Halmos, with invariant subspace lattice equal to a binest.
Kastis, Lefteris, Power, Stephen
openaire   +3 more sources

Dedalus: A flexible framework for numerical simulations with spectral methods

open access: yesPhysical Review Research, 2020
Numerical solutions of partial differential equations enable a broad range of scientific research. The Dedalus project is a flexible, open-source, parallelized computational framework for solving general partial differential equations using spectral ...
Keaton J. Burns   +4 more
doaj   +1 more source

Generalized variation and translation operator in some sequence spaces [PDF]

open access: yesHokkaido Mathematical Journal, 1988
Let X be the space of all real sequences. We consider two subsets X(\(\psi)\) and X(\(\phi\),\(\psi)\) defined by means of the sequential modulus and \(\phi\)-variation of sequences. Let \(X_{\zeta}\) be a modular space defined by a pseudomodular \(\zeta\) in X. Then \(\bar c=e_ 1\oplus e\) where \(e_ 1=(1,0,0,...)\) and \(e=(1,1,1,...)\), \(X^{\sim}_{\
MUSIELAK, J., WASZAK, A.
openaire   +2 more sources

Generalized frame operator, lower semiframes, and sequences of translates

open access: yesMathematische Nachrichten, 2023
AbstractGiven an arbitrary sequence of elements of a Hilbert space , the operator is defined as the operator associated to the sesquilinear form , for . This operator is in general different from the classical frame operator but possesses some remarkable properties. For instance, is always self‐adjoint with regard to a particular space, unconditionally
openaire   +2 more sources

Indefinite Hamiltonian systems whose Titchmarsh–Weyl coefficients have no finite generalized poles of non-positive type [PDF]

open access: yes, 2013
The two-dimensional Hamiltonian system (*)  y'(x)=zJH(x)y(x),  x∈(a,b), where the Hamiltonian H takes non-negative 2x2-matrices as values, and $J:= \begin{pmatrix} 0 & -1 \\ 1 & 0 \end{pmatrix}$, has attracted a lot of interest over the past decades ...
Harald Woracek   +3 more
core   +1 more source

Combining semantic and syntactic generalization in example-based machine translation [PDF]

open access: yes, 2011
In this paper, we report our experiments in combining two EBMT systems that rely on generalized templates, Marclator and CMU-EBMT, on an English–German translation task. Our goal was to see whether a statistically significant improvement could be achieved
Way, Andy   +3 more
core   +2 more sources

Localization Operators for the Linear Canonical Dunkl Windowed Transformation

open access: yesAxioms
One of the best known time–frequency tools for examining non-transient signals is the linear canonical windowed transform, which has been used extensively in signal processing and related domains. In this paper, by involving the harmonic analysis for the
Saifallah Ghobber, Hatem Mejjaoli
doaj   +1 more source

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