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Update chapter5.md

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Yiyuan Yang
2021-05-25 13:56:12 +08:00
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@@ -157,7 +157,7 @@ PPO 有一个前身叫做`信任区域策略优化(Trust Region Policy Optimizat
$$ $$
\begin{aligned} \begin{aligned}
J_{T R P O}^{\theta^{\prime}}(\theta)=E_{\left(s_{t}, a_{t}\right) \sim \pi_{\theta^{\prime}}}\left[\frac{p_{\theta}\left(a_{t} | s_{t}\right)}{p_{\theta^{\prime}}\left(a_{t} | s_{t}\right)} A^{\theta^{\prime}}\left(s_{t}, a_{t}\right)\right] \\ \\ J_{T R P O}^{\theta^{\prime}}(\theta)=E_{\left(s_{t}, a_{t}\right) \sim \pi_{\theta^{\prime}}}\left[\frac{p_{\theta}\left(a_{t} | s_{t}\right)}{p_{\theta^{\prime}}\left(a_{t} | s_{t}\right)} A^{\theta^{\prime}}\left(s_{t}, a_{t}\right)\right] \\ \\
<p align="right"> \mathrm{KL}\left(\theta, \theta^{\prime}\right)<\delta </p> \mathrm{KL}\left(\theta, \theta^{\prime}\right)<\delta
\end{aligned} \end{aligned}
$$ $$