In a previous paper, we have proved that a planar quadratic system with invariant parabola Г has at most one limit cycle. In this paper, we use geometric chara
Two phase ,miscible,incompressible flow in porous media is governed by a system of nonlinear partial differential equations. Many numerical methods have been gi
In this paper,a semlparametrie resresaion model in which errors are i. i. d random variables from an unknown density f(+) is considered. Based on Hall et al. (1