initial value problem短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 力数初值问题 Using the contraction mapping principle, we proved a theorem about the existence of solution for initial value problem of a class of implicit ordinary differential equations of the first order. 本文应用压缩映象原理证明了一阶隐式微分方程解的存在唯一性定理。 cnki