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Asymptotic behavior of solutions of neutral nonlinear differential equations

Jozef Džurina (2002)

Archivum Mathematicum

In this paper we study asymptotic behavior of solutions of second order neutral functional differential equation of the form x ( t ) + p x ( t - τ ) ' ' + f ( t , x ( t ) ) = 0 . We present conditions under which all nonoscillatory solutions are asymptotic to a t + b as t , with a , b R . The obtained results extend those that are known for equation u ' ' + f ( t , u ) = 0 .

Boundary value problems for systems of functional differential equations

Tadeusz Jankowski (2002)

Applications of Mathematics

Algorithms for finding an approximate solution of boundary value problems for systems of functional ordinary differential equations are studied. Sufficient conditions for consistency and convergence of these methods are given. In the last section, a construction of methods of arbitrary order is presented.

Dynamics of a two sex population with gestation period

Giorgio Busoni, Andrzej Palczewski (2000)

Applicationes Mathematicae

We investigate a mathematical model of population dynamics for a population of two sexes (male and female) in which new individuals are conceived in a process of mating between individuals of opposed sexes and their appearance is postponed by a period of gestation. The model is a system of two partial differential equations with delay which are additionally coupled by mathematically complicated boundary conditions. We show that this model has a global solution. We also analyze stationary ('permanent')...

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