积分因子及其应用

Integrating Factors and Its Applications

在介绍了恰当方程与积分因子的概念以及相关定理的基础上,通过对积分因子的研究,给出了一类微分不等式的证明,并给出了Picard定理唯一性的另一种证明方法。

Based on introduction of the concepts and related theorem of exact equations and integrating factors, through a study of integrating factors, proves a class of differential inequalities and presents a new uniqueness proof for Picard＇s theorem.