https://marcoepsilon.github.io/tags/linear-algebra/ Recent content in linear-algebra on Marco Epsilon Hugo -- gohugo.io zh-cn Marco Epsilon@Copyright Thu, 18 Jul 2019 00:00:00 +0000 https://marcoepsilon.github.io/posts/math/linear-algebra/ Thu, 18 Jul 2019 00:00:00 +0000 https://marcoepsilon.github.io/posts/math/linear-algebra/ 逆序数 考虑一个长度为n的偏序序列 \(a_{1}a_{2}a_{3}{\cdots}a_{n}\) 首先我们需要对这个序列规定标准次序,比如规定序列升序是升序排列的,而若序列中前面与后面的元素违反了标准次序