# 1989

## Measure of noncompactness and second order differential equations with deviating argument

AbstractWe study the existence and uniqueness of equations u′′(t)=f(t,u(t),u′(t),u(g₁(t)),…,u(g_{m}(t))) 1.1 u(t)=p(t),)t∈I╲intI,(1.2) in a Banach space. This problem is regarded as…

## Convex functions of order $$n$$ and $$P_n$$-simple functionals

Abstract A certain characterization of convex functions of order $$n$$ on an interval $$I$$ which are $$(n+1)$$ times differentiable on…

## The forth order asymptotic approximation of the meteorological primitive equations when the Rossby number tends to zero

AbstractAuthorsC. Vamoș -Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy A. Georgescu KeywordsCite this paper as:C. Vamoş, A. Georgescu, The forth order…

## The study of the pollutant dispersion in aerian and hydric medium using the homogenization method

AbstractAuthorsN. Suciu -Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy C. Vamoș -Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy A. Georgescu D.…

## On a Steffensen type method for solving nonlinear operator equations

Abstract Let $$X$$ be a Banach space, $$Y$$ a normed space and the nonlinear operator equation $$P\left( x\right) =0$$, where…

## On approximating the solutions of equations in metric spaces

Abstract Let $$\left( X,\rho \right)$$ be a complete metric space, $$f:X\rightarrow X$$ a nonlinear mapping. In order to solve the…