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笛卡儿叶形线

2009-08-02 22:49:23| 分类：高等数学图形动画 | 标签： |举报 |字号大中小订阅

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笛卡儿叶形线（Folium of Descartes）是以法国数学家笛卡儿（Descartes）的名字命名的曲线。

笛卡儿叶形线的一般方程是：

参数方程是：

笛卡儿叶形线的图形：

with(plots):a:=2:
curve:=plot([3*a*t/(1+t^3),3*a*t^2/(1+t^3),t=-0.7..50],thickness=3):
curve2:=plot([3*a*t/(1+t^3),3*a*t^2/(1+t^3),t=-50..-1.5],thickness=3):
line:=implicitplot(x+y=-a,x=-7..4,y=-6..5,color=blue,thickness=3):
display(curve,curve2,line,scaling=constrained,tickmarks=[0,0]);

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Last updated 03 Dec 2011

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