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fix ch2

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qiwang067
2021-08-08 15:04:01 +08:00
parent 719042c9f5
commit be3b6db203
1 changed files with 1 additions and 1 deletions
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docs/chapter2/chapter2.md
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@@ -179,7 +179,7 @@ $$
> \mathrm{E}(X \mid Y=y)=\sum_{x} x P(X=x \mid Y=y) > \mathrm{E}(X \mid Y=y)=\sum_{x} x P(X=x \mid Y=y)
> $$ > $$
令 $s_t=s$，我们对上述表达式求期望可得： 令 $s_t=s$，我们对 $\mathbb{E}\left[G_{t+1} \mid s_{t+1}\right]$ 求期望可得：
$$ $$
\begin{aligned} \begin{aligned}
\mathbb{E}\left[\mathbb{E}\left[G_{t+1} \mid s_{t+1}\right] \mid s_{t}\right] \mathbb{E}\left[\mathbb{E}\left[G_{t+1} \mid s_{t+1}\right] \mid s_{t}\right]