Results 101 to 110 of about 112,539 (200)

About the spectral problem arising from robotic manipulator mechanics

open access: yesМоделирование и анализ информационных систем, 2009
A spectral boundary problem of special type containing a spectral parameter in the boundary condition is completely solved in this paper. The characteristic equation for spectrum points determination is obtained, the energy innerproduct is derived, and ...
V. I. Voytitsky   +2 more
doaj  

Ion‐Scale Wave Emission and Absorption for Non‐Maxwellian Velocity Distributions in the Inner Heliosphere

open access: yesGeophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Hot and tenuous plasmas have velocity distribution functions (VDFs) significantly different from Maxwellian distributions. Characterizing how these differences impact wave damping and emission necessitates sophisticated methods for determining the associated dielectric plasma response.
K. G. Klein   +8 more
wiley   +1 more source

Hecke operators on rational functions

open access: yes, 2003
We define Hecke operators U_m that sift out every m-th Taylor series coefficient of a rational function in one variable, defined over the reals. We prove several structure theorems concerning the eigenfunctions of these Hecke operators, including the ...
Gil, Juan B., Robins, Sinai
core   +1 more source

Fast Retrieval of Cloud Optical Depth From Polarimetry and Multi‐Spectral Imagery That Accounts for Cloud Heterogeneity Using 3D Radiative Transfer

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 3, 16 February 2026.
Abstract We present a method for retrieving cloud optical depth that applies 3D radiative transfer to utilize the combination of polarimetry and multi‐spectral imagery that is newly available from satellite missions such as the Plankton, Aerosol, Cloud, Ocean, Ecosystem (PACE) Mission. Due to the approximate spectral invariance of scattering by clouds,
Jesse Loveridge   +2 more
wiley   +1 more source

Singular Eigenfunctions of Calogero-Sutherland Type Systems and How to Transform Them into Regular Ones

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2007
There exists a large class of quantum many-body systems of Calogero-Sutherland type where all particles can have different masses and coupling constants and which nevertheless are such that one can construct a complete (in a certain sense) set of exact ...
Edwin Langmann
doaj  

Hyper‐Reduced Model Based on the Proper Orthogonal Decomposition and the LU Factorization Applied to the Neutron Diffusion Eigenvalue Problem

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 127, Issue 3, 15 February 2026.
ABSTRACT An efficient method for solving large eigenvalue problems efficiently can be developed using hyper‐reduced order models, such as those arising from the LU Proper Orthogonal Decomposition (LUPOD). The LUPOD employs dominant orthogonal modes along with a flexible number of collocation points to establish a reduced scalar product, thereby ...
A. Vidal‐Ferràndiz   +4 more
wiley   +1 more source

On the point spectrum of quasi-periodic Schrödinger operators

open access: yesComptes Rendus. Mathématique
In this paper we study the spectral properties of a family of discrete one-dimensional quasi-periodic Schrödinger operators with discontinuous potential.
Refai, Walid
doaj   +1 more source

ON MAUTNER'S EIGENFUNCTION EXPANSION [PDF]

open access: yesProceedings of the National Academy of Sciences, 1956
Bade, William G., Schwartz, Jacob T.
openaire   +3 more sources

Spectral Properties of the Laplace Operator with Variable Dependent Boundary Conditions in a Disk

open access: yesAxioms
In this work, we study the spectral properties of the Laplace operator with variable dependent boundary conditions in a disk. The boundary conditions include periodic and antiperiodic boundary conditions as well as the generalized Samarskii–Ionkin-type ...
Aishabibi Dukenbayeva, Makhmud Sadybekov
doaj   +1 more source

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