In this paper, we prove a sufficent and necessary condition of existence for the solution of a kind of sublinear singular bound ary value problem.
证明了一类含脉冲次线性奇异边值问题解存在的充要性条件,推广了以前的相应结果。
2
When the price vector doesn t change along the idea changeable turnpike, we gives out the sufficent and neceseary condition about the price vector relative stability.