Lotka, Volterra and their model
Abstract The chemist and statistician Lotka, as well as the mathematician Volterra, studied the ecological problem of a predator population…
2014
The Planar Inverse Problem of Dynamics
Abstract We consider the following version of the inverse problem of Dynamics: given a monoparametric family of planar curves, find…
Bilateral inequalities for harmonic, geometric and Hölder means
Abstract For \(0<a<b\), the harmonic, geometric and Holder means satisfy \newline\( H<G<Q\). They are special cases \((p=-1,0,2)\) of power means…
Approximation by Bézier variant of the Baskakov-Kantorovich operators in the case 0<α<1
Abstract The present paper deals with the approximation of Bezier variants of Baskakov-Kantorovich operators \(V_{n,\alpha}^{\ast}\) in the case \(0<\alpha<1\). Pointwise…
On an approximation process of integral type
Abstract In this paper we study a class of integral type positive linear operators depending on a parameter \(\beta,0\leq\beta<1\). Approximation…
Some fixed point theorems in terms of two measures of noncompactness
AbstractIn this paper several fixed point theorems of Sadovskii type are obtained for operators on spaces endowed with two norms…
Implicit first order differential systems with nonlocal conditions
AbstractThe present paper is devoted to the existence of solutions for implicit first order differential systems with nonlocal conditions expressed…
On the continuation method and the nonlinear alternative for Caristi-type non-self-mappings
AbstractIn this note we survey some continuation fixed point theorems for Caristi-type non-self-mappings on complete metric spaces. Two new results,…
Multiple periodic solutions with prescribed minimal period to second-order Hamiltonian systems
AbstractA new variational method based on Ekeland’s principle is introduced for the existence, localization and multiplicity of periodic solutions of…
Perov type results in gauge spaces and applications to integral systems on semi-axis
AbstractIn this paper we present Perov type fixed point theorems for con-tractive mappings in Gheorghiu’s sense on spaces endowed with…