Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
如果 X~Exp(a), Y~Exp(b),考虑 (X|X>Y)。我的书说 (X|X>Y)=(X-Y+Y|X>Y)=(XY|X>Y)+(Y|X>Y)。但为什么??我不知道为什么我们可以把这两件事分开。
据我所知,Stack Overflow 不支持 MathJax/LaTeX,所以这是一张图片: