摘要
In this paper,we consider the oscillation of first order differential equation with several delays of the from x'(t)+∑i=1 n PiX(t-ri)=0 (0.1) Where Pi,ri,(i=1,2,…,n) are positive constants. Our aim is to give a necessary and sufficient condition for all sollution of (0.1) to be oscillation, Which answers an open problem by B.G Zhang in [1].
In this paper, we consider the oscillation of first order differential equation with sev
eral delays of the form
Where Pi,ri,(i= 1,2,...,n) are positive constants. Our aim is to give a necessary and sufficient condi
tion for all sollution of (0. 1) to be oscillation. Which answers an open problem by B.G Zhang in [1].
