Results 81 to 90 of about 588,164 (168)

Spectra of Graphs Resulting from Various Graph Operations and Products: a Survey

open access: yesSpecial Matrices, 2018
Let G be a graph on n vertices and A(G), L(G), and |L|(G) be the adjacency matrix, Laplacian matrix and signless Laplacian matrix of G, respectively. The paper is essentially a survey of known results about the spectra of the adjacency, Laplacian and ...
Barik S., Kalita D., Pati S., Sahoo G.
doaj   +1 more source

A generalization of the Landesman-Lazer condition

open access: yesElectronic Journal of Differential Equations, 2001
In this paper we prove the existence of solutions to the semi-linear problem $$ displaylines{ u''(x)+m^2 u(x)+g(x,u(x))=f(x)cr u(0)=u(pi)=0 }$$ at resonance.
Petr Tomiczek
doaj  

Continuous spectrum of a fourth order nonhomogeneous elliptic equation with variable exponent

open access: yesElectronic Journal of Differential Equations, 2011
In this article, we consider the nonlinear eigenvalue problem $$displaylines{ Delta(|Delta u|^{p(x)-2}Delta u )=lambda |u|^{q(x)-2}uquad hbox{in }Omega, cr u=Delta u = 0quad hbox{on }partialOmega, }$$ where $Omega$ is a bounded domain in $mathbb{R}^
Abdesslem Ayoujil   +1 more
doaj  

Error investigation of finite element approximation for a nonlinear Sturm–Liouville problem

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2017
A positive definite differential eigenvalue problem with coefficients depending nonlinearly on the spectral parameter has been studied. The differential eigenvalue problem is formulated as a variational eigenvalue problem in a Hilbert space with bilinear
A.A. Samsonov   +2 more
doaj  

Estimating eigenvalues [PDF]

open access: yesProceedings of the American Mathematical Society, 1952
openaire   +2 more sources

Impact of eigenvalues on the electron-phonon coupling strength of aluminium and its binary alloys

open access: yesBibechana, 2014
Aluminium is a third group element according to the periodic table. Chemically it is a reactive metal often forming complexes within its binary alloys.
B. K. Kantha   +3 more
doaj  

Functional motifs in food webs and networks. [PDF]

open access: yesProc Natl Acad Sci U S A
Habermann M   +3 more
europepmc   +1 more source

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