他还提出并讨论过等周问题。
He also proposed and discussed the problem of isoperimetric figures.
平面上等周问题是微分几何的基本问题之一。
The isoperimetric problem is one of the basic differential geometric problems.
在本文中，我们主要研究了局部精细点的结构，并讨论了其对抽象等周问题的应用。
In this paper, we investigate the structure of locally fine points and its applications to the abstract isopermetric problem.
本文首先使用初等方法导出三角形与四边形的等周不等式，进而用富里埃级数方法解决了一般等周问题。
We deduced equal perimeter inequality of triangle and quadrangle by elementary mathematical methods first and solved general equal perimeter problems by using methods of Fourier series.
本文首先使用初等方法导出三角形与四边形的等周不等式，进而用富里埃级数方法解决了一般等周问题。
We deduced equal perimeter inequality of triangle and quadrangle by elementary mathematical methods first and solved general equal perimeter problems by using methods of Fourier series.
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