但通常情况下你要考虑的问题中，函数会含有多个自变量。
But typically the function that you will have to strive to minimize or maximize will depend on several variables.
本文用压缩变挟方法，求解了函数解随自变量增加而迅速增长的一类常微分方程的边值问题。
In this paper, a kind of boundary value problems of ordinary differential equations, in which the function solutions increase rapidly, are solved by means of compressed transformation.
本文以两个自变量的拟线性双曲型方程的古尔沙问题为例，应用反函数和积分不等式证明了等价积分方程组解的存在唯一性，同时给出了解的存在区域和已知参量的依赖关系。
In this paper, we show the domain of the existence of the solution on Goursat problem for quasi—linear hyperbolic equation and obtain the Theorem of the existence and uniqueness in above domain.
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