Results 91 to 100 of about 1,034,900 (267)

Resonance for Singular Perturbation Problems [PDF]

open access: yesSIAM Journal on Applied Mathematics, 1981
Consider the resonance for a second-order equation ey"-xpy’+ qy = 0. Another proof is given for the necessity of the Matkowsky condition and the connection with a regular eigenvalue problem is established. Also, if p, q are analytic, necessary and sufficient conditions are derived.
openaire   +5 more sources

Matrix Measures and Finite Rank Perturbations of Self-adjoint Operators

open access: yes, 2019
Matrix-valued measures provide a natural language for the theory of finite rank perturbations. In this paper we use this language to prove some new perturbation theoretic results.
Liaw, Constanze, Treil, Sergei
core  

Convergence of singular perturbations in singular linear systems

open access: yesLinear Algebra and its Applications, 1997
A singularly perturbed singular system of differential equations is studied. Sufficient and necessary conditions for convergence are obtained. The criterion is valid both for the homogeneous and for the nonhomogeneous equation if the functions are sufficiently smooth.
Miquel Salichs, Javier Tolsa
openaire   +2 more sources

The effect of target orientation on the mean first passage time of a Brownian particle to a small elliptical absorber

open access: yesEuropean Journal of Applied Mathematics
We develop a high-order asymptotic expansion for the mean first passage time (MFPT) of the capture of Brownian particles by a small elliptical trap in a bounded two-dimensional region.
Sanchita Chakraborty   +2 more
doaj   +1 more source

Sliding Mode Control for Markovian Switching Singular Systems with Time-Varying Delays and Nonlinear Perturbations

open access: yesDiscrete Dynamics in Nature and Society, 2013
This paper is devoted to investigating sliding mode control (SMC) for Markovian switching singular systems with time-varying delays and nonlinear perturbations.
Guowei Yang, Yonggui Kao, Wei Li
doaj   +1 more source

Nonlinear diffusion on networks: Perturbations and consensus dynamics

open access: yesNetworks and Heterogeneous Media
In this paper, we study a class of equations representing nonlinear diffusion on networks. A particular instance of our model could be seen as a network equivalent of the porous-medium equation.
Riccardo Bonetto   +1 more
doaj   +1 more source

Existence and Stability of Periodic Solutions for Reaction-Diffusion Equations in the Two-Dimensional Case

open access: yesМоделирование и анализ информационных систем, 2016
Parabolic singularly perturbed problems have been actively studied in recent years in connection with a large number of practical applications: chemical kinetics, synergetics, astrophysics, biology, and so on. In this work a singularly perturbed periodic
N. N. Nefedov, E. I. Nikulin
doaj   +1 more source

Perturbing plane curve singularities

open access: yesRevista Matemática Iberoamericana, 2003
We describe the singularity of all but finitely-many germs in a pencil generated by two germs of plane curve sharing no tangent.
Casas, Eduardo, Peraire, Rosa
openaire   +5 more sources

A note on the perturbation of singular values

open access: yesLinear Algebra and its Applications, 1979
AbstractIn this note a variant of the classical perturbation theorem for singular values is given. The bounds explain why perturbations will tend to increase rather than decrease singular values of the same order of magnitude as the perturbation.
openaire   +3 more sources

Dynamical Graph Theory Networks Methods for the Analysis of Sparse Functional Connectivity Networks and for Determining Pinning Observability in Brain Networks

open access: yesFrontiers in Computational Neuroscience, 2017
Neuroimaging in combination with graph theory has been successful in analyzing the functional connectome. However almost all analysis are performed based on static graph theory. The derived quantitative graph measures can only describe a snap shot of the
Anke Meyer-Bäse   +9 more
doaj   +1 more source

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