Compression-expansion fixed point theorems in two norms
AbstractIn this paper we present compression-expansion fixed point theorems in cones where the compression and the expansion conditions are expressed…
2005
Boundary value problems arising in the percolation of water from a cylindrical reservoir into the surrounding soil
Abstract Existence results are established for a general class of second-order boundary value problems motivated from a problem arising in…
Compression-expansion fixed point theorem in two norms and applications
Abstract In this paper we present a two-norms version of Krasnoselskii’s fixed point theorem in cones. The abstract result is…
Existence theory for nonlinear operator equations of Hammerstein type in Banach spaces
AbstractWe use topological methods to develop an existence theory for nonlinear operator equations of Hammerstein type in Banach spaces. In…
Positive solutions of evolution operator equations
AbstractExistence and localization results are derived from Krasnoselskii’s compressionexpansion fixed point theorem in cones, for operator equations in spaces of…
The energy-free equations of the 3D inverse problem of dynamics
Abstract[Mathjax] Given a two-parametric family of curves \(f\) \(x,y,z)-c_{1},g\left(x,y,z\right) =c_{2}\), we look for potentials Vunder whose action a particle of…
On a class of approximation operators
AbstractIn this note we construct a class of approximation operators using polynomial sequences of binomial type. We compute the expression…
Sheffer sequences, probability distributions and approximation operators
AbstractWe present a new method to compute formulas for the action on monomials of a generalization of binomial approximation operators…
Approximations and ergodicity for transport in heterogeneous media by periodic random fields
AbstractAuthorsN. Suciu -Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy J.P. Eberhard C. Vamoș -Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy KeywordsCite…
On spectral properties of some Chebyshev-type methods. Dimension vs. structure
AbstractThe aim of the present paper is to analyze the non-normality of the matrices (finite dimensional operators) which result when some…