A fake Knot created by tying a Square Knot, then looping one end twice through the Knot such thatwhen both ends are pulled, the Knot vanishes.
数学辞典收录了8975条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。