Results 21 to 30 of about 19,025 (294)

Resolvent for Non-Self-Adjoint Differential Operator with Block-Triangular Operator Potential

open access: yesAbstract and Applied Analysis, 2016
A resolvent for a non-self-adjoint differential operator with a block-triangular operator potential, increasing at infinity, is constructed. Sufficient conditions under which the spectrum is real and discrete are obtained.
Aleksandr Mikhailovich Kholkin
doaj   +1 more source

Localizable spectrum and bounded local resolvent functions [PDF]

open access: yesArchiv der Mathematik, 2008
Given a Banach space operator with interior points in the localizable spectrum and without non-trivial divisible subspaces, this article centers around the construction of an infinite-dimensional linear subspace of vectors at which the local resolvent function of the operator is bounded and even admits a continuous extension to the closure of its ...
Müller, V. (Vladimír), Neumann, M.M.
openaire   +2 more sources

Scattering properties of Sturm-Liouville equations with sign-alternating weight and transmission condition at turning point

open access: yesOpen Mathematics, 2023
In this article, we focus on the scattering analysis of Sturm-Liouville type singular operator including an impulsive condition and turning point. In the classical literature, there are plenty of papers considering the positive values of the weight ...
Çoşkun Nimet, Görgülü Merve
doaj   +1 more source

Rotationally resolved electronic spectrum of propadienylidene

open access: yesJournal of Molecular Spectroscopy, 2005
Abstract The rotationally resolved electronic spectrum of a vibrational band in the A ˜ 1 A 2 – X ˜ 1 A 1 transition of the cumulene carbon chain C 3 H 2 was measured in the 625 nm region in a supersonic discharge using cw cavity ring down spectroscopy. The rotational structure was analysed using
Birza, Petre   +4 more
openaire   +2 more sources

A boundary value problem with a discontinuous coefficient and containing a spectral parameter in the boundary condition

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1995
A singular non-self-adjoint boundary value problem is considered. This problem has a discontinuous coefficient with a spectral parameter in the boundary condition. Some solutions of the eigenvalue equation are given.
A. A. Darwish
doaj   +1 more source

Phase-resolved spectrum of the Crab pulsar from NICER [PDF]

open access: yesAstronomy & Astrophysics, 2021
Context. Studies of the high-energy emission regions of rotation-powered pulsars are typically based on folded light curves (FLCs) and phase-resolved spectra (PRS). Aims. This work uses the NICER observatory to obtain the highest resolution FLC and PRS of the Crab pulsar at soft X-ray energies. Methods.
openaire   +2 more sources

On the relevance of Reynolds stresses in resolvent analyses of turbulent wall-bounded flows

open access: yes, 2019
The ability of linear stochastic response analysis to estimate coherent motions is investigated in turbulent channel flow at friction Reynolds number Re$_\tau$ = 1007.
Cossu, Carlo   +3 more
core   +1 more source

Quantization and the Resolvent Algebra [PDF]

open access: yes, 2019
We introduce a novel commutative C*-algebra of functions on a symplectic vector space admitting a complex structure, along with a strict deformation quantization that maps a dense subalgebra to the resolvent algebra introduced by Buchholz and Grundling ...
van Nuland, Teun D. H.
core   +2 more sources

The Faddeev Equation and the Essential Spectrum of a Model Operator Associated with the Hamiltonian of a Nonconserved Number of Particles

open access: yesAdvances in Mathematical Physics, 2014
A model describing a truncated operator H (truncated with respect to the number of particles) and acting in the direct sum of zero-, one-, and two-particle subspaces of fermionic Fock space FaL2T3 over L2(T3) is investigated.
Zahriddin Muminov   +2 more
doaj   +1 more source

On the limit spectrum of a degenerate operator in the framework of periodic homogenization or singular perturbation problems

open access: yesComptes Rendus. Mathématique, 2022
In this paper we perform the analysis of the spectrum of a degenerate operator $A_\varepsilon $ corresponding to the stationary heat equation in a $\varepsilon $-periodic composite medium having two components with high contrast diffusivity.
Sili, Ali
doaj   +1 more source

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