Ali Parsian - Department of Mathematics, Tafresh University, Tafresh, P.C ۳۹۵۱۸-۷۹۶۱۱, Iran

In this paper we are supposed to define the θ−vector field on the n−surface S and then investigate about the existence and uniqueness of its integral curves by the Theory of Ordinary Differential Equations. Then thesubject is followed through some examples.

Methods of ordinary differential equations, Location of integral curves, Surfaces of general type