数学不仅仅是一系列抽象概念的集合,而是一种让我们理解宇宙的语言。
I don't write to explain. I write to explore.
I'm not a product of my environment. My environment is a product of me.
The greatest enemy of a trader is fear and greed.
I don't do easy. I make things happen.
从n对观测值的样本中获得的相关系数的可能误差是sqrt((1-r²)/(n-2))。