论文标题
一元素的换向课程
One-element commutation classes
论文作者
论文摘要
对于任何置换w，我们都表征了W的简化单词是他们自己的换向类别。当w是长元素n（n-1）... 321和n \ ge 4时，恰好有四个这样的单词。
For any permutation w, we characterize the reduced words of w that are their own commutation class. When w is the long element n(n-1)...321 and n \ge 4, there are exactly four such words.
