Singular nonlinear equations on an unbounded interval

Nonlinear Neutral Integrodifferential Equations on Unbounded Intervals

Abstract In this paper we prove the existence of solutions for a boundary value nonlinear neutral integrodifferential problem in Rn defined on an unbounded interval. The result is obtained by using the Schaefer fixed point theorem and by using a recent result [4] on compactness of a continuous operator K : BC(I,Rn) → BC(I,Rn); here BC(I,Rn) is the Banach space of continuous functions from the (...

Quadrature rules on unbounded interval

After some remarks on the convergence order of the classical gaussian formula for the numerical evaluation of integrals on unbounded interval, the authors develop a new quadrature rule for the approximation of such integrals of interest in the practical applications. The convergence of the proposed algorithm is considered and some numerical examples are given.

global results on some nonlinear partial differential equations for direct and inverse problems

در این رساله به بررسی رفتار جواب های رده ای از معادلات دیفرانسیل با مشتقات جزیی در دامنه های کراندار می پردازیم . این معادلات به فرم نیم-خطی و غیر خطی برای مسایل مستقیم و معکوس مورد مطالعه قرار می گیرند . به ویژه، تاثیر شرایط مختلف فیزیکی را در مساله، نظیر وجود موانع و منابع، پراکندگی و چسبندگی در معادلات موج و گرما بررسی می کنیم و به دنبال شرایطی می گردیم که متضمن وجود سراسری یا عدم وجود سراسر...

Exact solutions of nonlinear interval Volterra integral equations

On Singular Interval Systems

We consider the interval iteration [x]kH = [A][X]k+ [b]with p(I[A]I) ::; 1 where I[A]I denotes the absolute value of the given interval matrix [A]. If I[A]I is irreducible we derive a necessary and sufficient criterion für the existence of the limit [x]*= [x]*([x]o)of each sequence ([xt) of interval iterates. In this way we generalize a well-known theorem of O. Mayer [6] on the above-mentioned ...