= 0 , then(1)If K≠0,then S is a surface of revolution.
=0,则(1)如果K≠0,则S是旋转曲面。
参考来源 - 具有限定高斯曲率的圆纹曲面
回转面
回转曲面
旋转曲面
旋转曲面
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Surface of revolution
abstract:A surface of revolution is a surface in Euclidean space created by rotating a curve (the generatrix) around a straight line in its plane (the axis).Analytic Geometry Middlemiss, Marks, and Smart.