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AMC
2004
97views more  AMC 2004»
13 years 11 months ago
Analysis of three-dimensional grids: the eight-point cube
It is widely believed that quadratic coefficients cannot be estimated from eight data in cubical array. This paper illustrates the estimation of those coefficients by means of by ...
G. L. Silver
AMC
2004
76views more  AMC 2004»
13 years 11 months ago
Displacement structure of weighted pseudoinverses
Estimates for the rank of A MN V - UA MN and more general displacement of A MN are presented,where A MN is the weighted pseudoinverse of a matrix A.The results are applied to the ...
Jianfeng Cai, Yimin Wei
AMC
2004
72views more  AMC 2004»
13 years 11 months ago
Global attraction to the origin in a parametrically driven nonlinear oscillator
We consider a parametrically-driven nonlinear ODE, which encompasses a simple model of an electronic circuit known as a parametric amplifier, whose linearisation has a zero eigenv...
M. V. Bartuccelli, J. H. B. Deane, G. Gentile, S. ...
AMC
2004
95views more  AMC 2004»
13 years 11 months ago
Optimal multigrid solutions of two-dimensional convection-conduction problems
The present work investigates the efficiency of the multigrid numerical method when used to solve two-dimensional laminar velocity and temperature fields inside a rectangular doma...
Maximilian S. Mesquita, Marcelo J. S. de Lemos
AMC
2004
88views more  AMC 2004»
13 years 11 months ago
On the stability of the second-order delay differential equations with variable coefficients
The sufficient conditions for the stability of the solutions of the second-order linear delay differential equations with variable coefficients is constructed.
Ali Fuat Yeniçerioglu, Salih Yalçinb...
AMC
2004
105views more  AMC 2004»
13 years 11 months ago
Block matrix Sinc-Galerkin solution of the wind-driven current problem
A block matrix formulation is presented for the Sinc-Galerkin technique applied to the wind-driven current problem from oceanography. The block matrix form is used to determine an...
Sanoe Koonprasert, Kenneth L. Bowers
AMC
2004
95views more  AMC 2004»
13 years 11 months ago
On lacunary invariant sequence spaces defined by a sequence of modulus functions
Abstract. The purpose of this paper is to introduce and study some sequence spaces which are defined by combining the concepts of lacunary convergence, invariant mean and the seque...
Vatan Karakaya, Necip Simsek