Results 11 to 20 of about 2,168 (155)

Unfolding of eigenvalue surfaces near a diabolic point due to a complex perturbation [PDF]

open access: yes, 2004
The paper presents a new theory of unfolding of eigenvalue surfaces of real symmetric and Hermitian matrices due to an arbitrary complex perturbation near a diabolic point.
A A Mailybaev   +15 more
core   +2 more sources

A Priori Bounds And Existence Of Positive Solutions For Semilinear Elliptic Systems [PDF]

open access: yes, 2017
We provide a-priori L∞ bounds for classical positive solutions of semilinear elliptic systems in bounded convex domains when the nonlinearities are below the power functions v^p and u^q for any (p,q) lying on the critical Sobolev hyperbola.
Mavinga, Nsoki, Pardo, R.
core   +2 more sources

Nonzero radial solutions for a class of elliptic systems with nonlocal BCs on annular domains [PDF]

open access: yes, 2014
We provide new results on the existence, non-existence, localization and multiplicity of nontrivial solutions for systems of Hammerstein integral equations.
Infante, Gennaro, Pietramala, Paolamaria
core   +1 more source

Computation of multiple eigenvalues and generalized eigenvectors for matrices dependent on parameters

open access: yes, 2005
The paper develops Newton's method of finding multiple eigenvalues with one Jordan block and corresponding generalized eigenvectors for matrices dependent on parameters.
Anderson   +38 more
core   +1 more source

Complementing maps, continuation and global bifurcation [PDF]

open access: yes, 1983
We state, and indicate some of the consequences of, a theorem whose sole assumption is the nonvanishing of the Leray- Schauder degree of a compact vector field, and whose conclusions yield multidimensional existence, continuation and bifurcation ...
Fitzpatrick, P.   +2 more
core   +1 more source

Extracting falsifiable predictions from sloppy models

open access: yes, 2007
Successful predictions are among the most compelling validations of any model. Extracting falsifiable predictions from nonlinear multiparameter models is complicated by the fact that such models are commonly sloppy, possessing sensitivities to different ...
Casey, Fergal P.   +4 more
core   +1 more source

Uniform determinantal representations [PDF]

open access: yes, 2016
The problem of expressing a specific polynomial as the determinant of a square matrix of affine-linear forms arises from algebraic geometry, optimisation, complexity theory, and scientific computing. Motivated by recent developments in this last area, we
Boralevi, Ada   +4 more
core   +2 more sources

Asymptotic spectrum of multiparameter eigenvalue problems [PDF]

open access: yesProceedings of the Edinburgh Mathematical Society, 1996
Results are given for the asymptotic spectrum of a multiparameter eigenvalue problem in Hilbert space. They are based on estimates for eigenvalues derived from the minim un-maximum principle. As an application, a multiparameter Sturm-Liouville problem is considered.
openaire   +1 more source

Two-parameter Sturm-Liouville problems [PDF]

open access: yes, 2012
This paper deals with the computation of the eigenvalues of two-parameter Sturm- Liouville (SL) problems using the Regularized Sampling Method, a method which has been effective in computing the eigenvalues of broad classes of SL problems (Singular, Non ...
Boucherif, A., Chanane, B.
core  

Multiparameter spectral analysis for aeroelastic instability problems

open access: yes, 2017
This paper presents a novel application of multiparameter spectral theory to the study of structural stability, with particular emphasis on aeroelastic flutter.
Gutschmidt, Stefanie, Pons, Arion
core   +1 more source

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