You know, it was the old quantum mechanics, solving partial differential equations.

你知道，这是旧力，解偏微分方程。

So all of those things usually center on solving the three-dimensional partial differential equations.

因此，所有这些工作通常都绕着解三维偏微分方程展开。

But to know the two things in physics to solve a partial differential equation are the initial conditions and the boundary conditions.

但要知道在物理解偏微分方程所需两个要素是初始条件和边界条件。

So it matches or tries to imitate what applications do in solving that three-dimensional partial differential equation.

因此，它匹配或试图模仿应用程序在解三维偏微分方程时所执行操作。