The goal of this paper is to consider a differential equation system written as an interesting
equivalent form that has not been used before. Using Perov's fixed point theorem in …

In this paper, we prove some coupled fixed point theorems for O-compatible mappings in
partially ordered generalized metric spaces under certain conditions to extend and …

A new approach for neutral Fredholm integro-differential equations in Banach spaces, using
the Perov's fixed point theorem of existence, uniqueness and approximation is presented …

In this paper, we will state and prove the existence and uniqueness theorems of solutions of
the delay differential equations with variable time delay. The followed approach is based on …

PERIODIC SOLUTIONS FOR NONLINEAR NEUTRAL DELAY INTEGRO-DIFFERENTIAL
EQUATIONS 1. Introduction The existence of positive solution Page 1 Electronic Journal of …

Using the Perov's fixed point theorem and the theorem of fiber generalized contractions, we
obtain the smooth dependence by lag of the positive periodic solution of a neutral delay …

Értelmezés 1.4. 1.(IA Rus [70]) Adott az (X, d) metrikus tér. Az A: X→ X operátor gyengén
Picard (GyPO), ha az (An (x)) n∈ N sorozat minden x∈ X esetén konvergál és határértéke …