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 ...
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 ...
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. ...
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...
The sufficient conditions for the stability of the solutions of the second-order linear delay differential equations with variable coefficients is constructed.
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...
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...