Results 81 to 90 of about 15,892 (238)

Conical Nodes In Nonadiabatic Eigenfunctions

open access: yes, 2019
Where the Born-Oppenheimer Approximation breaks down, systems can best be understood using exact nonadiabatic eigenfunctions. Exact nonadiabatic eigenstates are calculated and factored using Hunter’s exact factorization and it is found that when ...
Foster, Peter Wesley
core   +1 more source

Going Next after “A Guide to Special Functions in Fractional Calculus”: A Discussion Survey

open access: yesMathematics
In the survey Kiryakova: “A Guide to Special Functions in Fractional Calculus” (published in this same journal in 2021) we proposed an overview of this huge class of special functions, including the Fox H-functions, the Fox–Wright generalized ...
Virginia Kiryakova   +1 more
doaj   +1 more source

Boundary problem for the singular heat equation

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2017
The scheme for solving of a mixed problem with general boundary conditions is proposed for a heat equation \[a(x)\frac{\partial T}{\partial \tau}= \frac{\partial}{\partial x} \left(\lambda(x)\frac{\partial T}{\partial x}\right)\] with coefficient $a(x ...
O.V. Makhnei
doaj   +1 more source

Comparative Density Functional Theory Insights Into B16C16 and Si16C16 Nanocages for Sensing Oil‐Derived Fault Gases in Energy and Industrial Systems

open access: yesChemistryOpen, Volume 15, Issue 6, June 2026.
B16C16 and Si16C16 nanocages were investigated via DFT for sensing transformer oil fault gases (C2H4, CO, H2S). BC nanocages exhibit stronger adsorption, reduced energy gaps, enhanced electrical conductivity, and positive sensing responses compared to SiC. NCI and QTAIM analyses reveal covalent and partially covalent interactions.
Khalid Abdullah Alrashidi   +3 more
wiley   +1 more source

On Autonomy Imposition in Zero Interval Limit Perturbation Expansion for the Spectral Entities of Hilbert–Schmidt Integral Operators

open access: yesMathematics, 2017
In this work, we deal with the autonomy issue in the perturbation expansion for the eigenfunctions of a compact Hilbert–Schmidt integral operator. Here, the autonomy points to the perturbation expansion coefficients of the relevant eigenfunction not ...
Süha Tuna, Metin Demiralp
doaj   +1 more source

Quantum Information Measures of a Dirichlet Waveguide with Neumann Window(s)

open access: yesAdvanced Quantum Technologies, Volume 9, Issue 6, June 2026.
ABSTRACT Engineering boundary conditions in low‐dimensional structures provides a simple yet powerful way of shaping how quantum information is stored and transported. We investigate a flat 2D Dirichlet waveguide containing one or two finite Neumann windows and compute the bound states in both position and momentum space as functions of the window ...
Firoz Chogle, Berihu Teklu
wiley   +1 more source

Invariant Imbedding and Case Eigenfunctions [PDF]

open access: yes, 1969
A new approach to the solution of transport problems, based on the ideas introduced into transport theory by Ambarzumian, Chandrasekhar, and Case, is discussed.
S. Pahor   +3 more
core   +1 more source

Broad‐Scale Climatic Gradients Drive Multiple Facets of Scorpion Beta Diversity in Northeastern Brazil

open access: yesJournal of Biogeography, Volume 53, Issue 6, June 2026.
ABSTRACT Aim Beta diversity analyses clarify mechanisms structuring ecological communities, but their multidimensional facets remain poorly explored in arthropods. Here, we quantified taxonomic, phylogenetic, and functional beta diversity in scorpions, partitioned these facets into species replacement and richness differences, and evaluated the ...
Stênio Ítalo Araújo Foerster   +1 more
wiley   +1 more source

Symmetric polynomials: DIM integrable systems versus twisted Cherednik systems

open access: yesPhysics Letters B
We discuss interrelations between eigenfunctions of the Hamiltonians associated with the commutative (integer ray) subalgebras of the Ding-Iohara-Miki algebra and those of the twisted Cherednik system.
A. Mironov, A. Morozov, A. Popolitov
doaj   +1 more source

Nonstationary scattering of elastic waves by a spherical inclusion [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика
Problems of elastic wave scattering by various types of inhomogeneities rank among the most complex and relevant topics in the field of deformable solid dynamics.
Usmonov, Botir Shukurillaevich   +3 more
doaj   +1 more source

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