# 2005

## Construction of upper and lower solutions with applications to singular boundary value problems

Abstract An upper and lower solution theory is presented for the Dirichlet boundary value problem $$y^{\prime\prime}+f(t,y,y^{\prime})=0$$, $$0<t <1$$ with $$y(0)=y(1)=0$$.…

## Existence and localization results for semi-linear problems

AbstractThis survey paper presents the new method worked out in [14] and [15] for the existence and localization of solutions…

## 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…

## Families of orbits in planar anisotropic fields

AbstractAuthorsKeywordsReferencesPDFScanned paper. Latex version of the paper. Cite this paper as:Anisiu MC., Bozis G., Families of orbits in planar anisotropic fields, …

## A solvable version of the inverse problem of dynamics

AbstractAuthorsKeywordsReferencesPDFScanned paper. Latex version of the paper. Cite this paper as:Bozis G., Anisiu M.C., A solvable version of the inverse…

## The energy-free equations of the 3D inverse problem of dynamics

AbstractAuthorsKeywordsReferencesPDFScanned paper. Latex version of the paper. Cite this paper as:Anisiu, M.C., The energy-free equations of the 3D inverse problem of…

## Symmetric periodic orbits in the anisotropic Schwarzshild-type problem

AbstractAuthorsKeywordsReferencesPDF(pdf file here) Cite this paper as:Mioc V, Anisiu M.C, Barbosu M., Symmetric periodic orbits in the anisotropic Schwarzshild-type problem, Celestial…