2004/12/23 | 第一类尖点[Spinode]
类别(∑〖数学〗) | 评论(0) | 阅读(28) | 发表于 13:19
A function f(x) has a spinode (also called a horizontal cusp) at a point if f(x) is continuous at and

from one side while

from the other side, so the curve is continuous but the derivative is not.s
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