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一个费解的拓扑问题
原链接如此:https://math.stackexchange.com/questions/237886/topology-puzzle-without-cut-the-rope-separate-two-rings
如下图所示,一个具有弹性可伸缩的绳结,如何在不剪断它的情况下将其解开。
原链接的解释并没有看懂,这么长时间有几次以为自己想明白了,但其实还没有。
好像又理解了 https://math.stackexchange.com/questions/1715433/need-help-to-visualise-topological-puzzle
再贴几个出处: https://www.maths.tcd.ie/~hylandst/puzzles.html https://mathtuition88.com/2016/04/07/topology-puzzle/
查到了这种好像叫做 Pretzel Transformation(椒盐脆饼转换???)
然后怎么还看到了2016年的诺贝尔物理学奖