连续函数的分类
\(C^0\)：函数连续
\(C^1\)：导函数连续
\(C^r\)：一到 \(r\) 阶导函数都连续
注意：并没有把【函数连续但导函数不连续】的函数专门分成一类。
「以解决问题为乐」
真的喜欢么？真的喜欢就去做吧。
Lost Boy Calling 。。。。
... Many of these issues are best dealt with at the algorithmic level, rather than by "tweaking" the code.
This is an obscurity that catches the unwary.
原来我什么都不懂。
