Results 61 to 70 of about 134,349 (198)

Eigenvalues and Eigenvectors [PDF]

open access: yes, 2001
Using Maple or Mathmatica, learner should be able to experiment with the computation and use of eigenvalues and ...
Smith, David
core   +2 more sources

Shape optimization for an elliptic operator with infinitely many positive and negative eigenvalues

open access: yesAdvances in Nonlinear Analysis, 2018
This paper deals with an eigenvalue problem possessing infinitely many positive and negative eigenvalues. Inequalities for the smallest positive and the largest negative eigenvalues, which have the same properties as the fundamental frequency, are ...
Bandle Catherine, Wagner Alfred
doaj   +1 more source

Algebraic conditions and the sparsity of spectrally arbitrary patterns

open access: yesSpecial Matrices, 2021
Given a square matrix A, replacing each of its nonzero entries with the symbol * gives its zero-nonzero pattern. Such a pattern is said to be spectrally arbitrary when it carries essentially no information about the eigenvalues of A.
Deaett Louis, Garnett Colin
doaj   +1 more source

Oscillation and spectral properties of some classes of higher order differential operators and weighted $n$th order differential inequalities

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
In this paper, we obtain strong oscillation and non-oscillation conditions for a class of higher order differential equations in dependence on an integral behavior of its coefficients in a neighborhood of infinity.
Aigerim Kalybay   +2 more
doaj   +1 more source

Limit points of eigenvalues of (di)graphs [PDF]

open access: yes, 2006
summary:The study on limit points of eigenvalues of undirected graphs was initiated by A. J. Hoffman in 1972. Now we extend the study to digraphs. We prove: 1. Every real number is a limit point of eigenvalues of graphs.
Chen, Zhibo, Zhang, Fuji
core   +1 more source

Regular graphs with four eigenvalues [PDF]

open access: yes
We study the connected regular graphs with four distinct eigenvalues. Properties and feasibility conditions of the eigenvalues are found. Several examples, constructions and characterizations are given, as well as some uniqueness and nonexistence results.
Dam, E.R. van
core   +4 more sources

Fractional Sturm–Liouville Eigenvalue Problems, II

open access: yesFractal and Fractional, 2022
We continue the study of a non-self-adjoint fractional three-term Sturm–Liouville boundary value problem (with a potential term) formed by the composition of a left Caputo and left Riemann–Liouville fractional integral under Dirichlet type boundary ...
Mohammad Dehghan, Angelo B. Mingarelli
doaj   +1 more source

Eigenvalues and Holonomy

open access: yes, 2002
We estimate the eigenvalues of connection Laplacians in terms of the non-triviality of the holonomy.
Ballmann, Werner   +2 more
openaire   +2 more sources

On eigenvalues of random complexes [PDF]

open access: yesIsrael Journal of Mathematics, 2016
Extended full version of an extended abstract that appeared at SoCG 2012, to appear in Israel Journal of ...
Anna Gundert, Uli Wagner 0001
openaire   +3 more sources

Eigenvalue Attraction [PDF]

open access: yesJournal of Statistical Physics, 2015
We prove that the complex conjugate (c.c.) eigenvalues of a smoothly varying real matrix attract (Eq. 15). We offer a dynamical perspective on the motion and interaction of the eigenvalues in the complex plane, derive their governing equations and discuss applications. C.c. pairs closest to the real axis, or those that are ill-conditioned, attract most
openaire   +5 more sources

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