Results 41 to 50 of about 1,495,717 (183)

On linear sections of orthogonally additive operators

open access: yesМатематичні Студії, 2022
Our first result asserts that, for linear regular operators acting from a Riesz space with the principal projection property to a Banach lattice with an order continuous norm, the $C$-compactness is equivalent to the $AM$-compactness. Next we prove that,
A. Gumenchuk, I. Krasikova, M. Popov
doaj   +1 more source

Preliminary report: black system event in South Australia on 28 September 2016 [PDF]

open access: yes, 2016
This preliminary report explains how severe weather moved through South Australia on the afternoon of Wednesday 28 September 2016, with high winds, thunderstorms, lightning strikes, hail, and heavy rainfall.
Australian Energy Market Operator
core   +1 more source

On the Spectra of One-Dimensional Schrödinger Operators With Singular Potentials

open access: yesFrontiers in Physics, 2019
The paper is devoted to the spectral properties of one-dimensional Schrödinger operators (1)Squ(x)=(-d2dx2+q(x))u(x),    x∈ℝ, with potentials q = q0+qs, where q0∈L∞(ℝ) is a regular potential, and qs∈D′(ℝ) is a singular potential with support on a ...
Vladimir S. Rabinovich   +2 more
doaj   +1 more source

Operator valued Dirichlet problem in the plane [PDF]

open access: yes, 2012
We consider an operator valued Dirichlet problem for harmonic mappings and prove the existence of a Perron-like solution. To formulate the Perron’s construction we make use of Olson’s notion of spectral order.
Göğüş, Nihat Gökhan
core   +3 more sources

Numerical solution for fractional Neumann series equations

open access: yesAin Shams Engineering Journal
This study focuses on fractional differential equations defined by the Neumann series operator. The inverse of the fractional integral operator (1−α)I0+αIα is associated with a MABC operator.
Dumitru Baleanu, Babak Shiri
doaj   +1 more source

Uniform Basis Property of the System of Root Vectors of the Dirac Operator

open access: yesСовременная математика: Фундаментальные направления, 2018
We study one-dimensional Dirac operator L on the segment [0,π] with regular in the sense of Birkhoff boundary conditions U and complex-valued summable potential P=(pij(x)), i,j=1,2.
A M Savchuk, I V Sadovnichaya
doaj   +1 more source

Degenerate Elliptic Operators as Regularizers [PDF]

open access: yesTransactions of the American Mathematical Society, 1983
The spaces K m k
openaire   +1 more source

Psi_B-energy operator and cross-power spectral density [PDF]

open access: yes, 2014
In this paper we consider the hermitian extension of the cross-Psi_B-energy operator that we will denote by Psi_H. In addition, cross energy terms are formalized through multivariate signals representation.
CHONAVEL, Thierry   +2 more
core   +1 more source

Quantum stochastic operator cocycles via associated semigroups. [PDF]

open access: yes, 2007
A recent characterisation of Fock-adapted contraction operator stochastic cocycles on a Hilbert space, in terms of their associated semigroups, yields a general principle for the construction of such cocycles by approximation of their stochastic ...
Wills, S. J., Lindsay, J. Martin
core   +4 more sources

The nonlocal problem for the $2n$ differential equations with unbounded operator coefficients and the involution

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2018
We study a problem with periodic boundary conditions for a $2n$-order differential equation whose coefficients are non-self-adjoint operators. It is established that the operator of the problem has two invariant subspaces generated by the involution ...
Ya.O. Baranetskij   +3 more
doaj   +1 more source

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