Results 11 to 20 of about 40 (40)

Isoparametric mixed finite element approximation of eigenvalues and eigenvectors of 4th order eigenvalue problems with variable coefficients [PDF]

open access: yes, 2001
. Estimates for the combined eect of boundary approximation and numerical integration on the approximation of (simple) eigenvalues and eigenvectors of 4th order eigenvalue problems with variable/constant coecients in convex domains with curved boundary ...
Nataraj, Neela   +4 more
core   +2 more sources

Elliptic equations in divergence form, geometric critical points of solutions and Stekloff eigenfunctions [PDF]

open access: yes, 1994
. The Stekloff eigenvalue problem (1.1) has a ’ countable number of eigenvalues (Pn}n = 1,2..... each of finite multiplicity. In this paper the authors give an upper estimate, in terms of the integer n, of the multiplicity of Pn, and the number of ...
ALESSANDRINI, GIOVANNI   +4 more
core   +1 more source

Courant-sharp Robin eigenvalues for the square -the case with small Robin parameter [PDF]

open access: yes, 2019
International audienceThis article is the continuation of our first work on the determination of the cases where there is equality in Courant's Nodal Domain theorem in the case of a Robin boundary condition (with Robin parameter h).
Gittins, K   +4 more
core   +2 more sources

The modified BenjaminBona-Mahony equation via the extended generalized Riccati equation mapping method [PDF]

open access: yes, 2012
The generalized Riccati equation mapping is extended together with the ( ) expansion method and is a powerful mathematical tool for solving nonlinear partial differential equations.
F A Abdullah   +3 more
core  

Pseudospectra of the Wave Operator with an Absorbing Boundary

open access: yes, 1993
For systems which can be described by u t = Au, with a highly non-normal matrix or operator A, the spectrum of A may describe the behavior of the system poorly.
Lloyd N. Trefethen   +3 more
core  

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