## Abstract

The purpose of the present paper is to study the existence of solutions to initial value problems for nonlinear first order differential systems subject to nonlinear nonlocal initial conditions of functional type.

The approach uses vector-valued metrics and matrices convergent to zero. Two existence results are given by means of Schauder and Leray-Schauder fixed point principles and the existence and uniqueness of the solution is obtained via a fixed point theorem due to Perov. Two examples are given to illustrate the theory.

## Authors

**Octavia Bolojan
**Department of Mathematics, Babes-Bolyai University, Cluj-Napoca, Romania

**Gennaro Infante
**Università della Calabria, Dipartimento di Matematica ed Informatica, Cosenza, Italy

**Radu Precup**

Department of Mathematics, Babes-Bolyai University, Cluj-Napoca, Romania

## Keywords

nonlinear differential system; nonlocal boundary condition; nonlinear boundary condition; fixed point; vector-valued norm; matrix convergent to zero

## Paper coordinates

O. Bolojan, G. Infante, R. Precup, *Existence results for systems with nonlinear coupled nonlocal initial conditions*, Math. Bohem. 140 (2015), no. 4, 371-384, http://dx.doi.org/10.21136/MB.2015.144455

## About this paper

##### Journal

Mathematica Bohemica

##### Publisher Name

Institute of Mathematics of the Czech Academy of Sciences

##### Print ISSN

2464-7136

##### Online ISSN

0862-7959

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