This refers to random variables that have fat-tailed distributions-- random variables that occasionally give you really big outcomes.
这就表示,服从长尾分布的随机变量,这些数据出现极端值的概率比较大
It could be that a random distribution-- I don't have colored chalk here I don't think, so I will use a dash line to represent the fat-tailed distribution.
这是一个随机分布,这里没有彩色粉笔,我就用虚线,来表示长尾分布
All right, this is actually kind of nice.
表示变长元素的方法了。
If you drop the arrow, it's the usual convention, if you're talking about the length of the vector A.
如果你把箭头去掉,就表示矢量 A 的模长,这是约定俗成的
A is the length of A.
表示矢量 A 的模长
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