摘要
本文利用数学分析方法,证明了由若干条封闭曲线所围两平面区域面积之比是一仿射不变量。
This paper, using mathematical analysis method,shows that the area ratio of two plane regions bounded by several arbitrary closed curves is an affine invariant.
出处
《安阳师范学院学报》
2004年第5期21-22,共2页
Journal of Anyang Normal University
关键词
平面区域
面积
封闭曲线
仿射变换
仿射不变量
plane region
area
closed curve
affine transformation
affine invariant
