From 767648b38b39f1922c7a4c36371a9c79a39a8c73 Mon Sep 17 00:00:00 2001
From: xiaowei_xing <997427575@qq.com>
Date: Fri, 20 Dec 2019 16:29:21 +0900
Subject: [PATCH] test

---
 docs/11&12.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/docs/11&12.md b/docs/11&12.md
index b8c32af..e8cbe6c 100644
--- a/docs/11&12.md
+++ b/docs/11&12.md
@@ -149,4 +149,11 @@ $$
 $$
 a_{t}=\mathop{\arg\max}_ {a\in A}(\mu_a + c\frac{\sigma_{a}}{\sqrt{N(a)}})。
 \tag{11}
+$$
+
+另一种方式是概率匹配（probability matching），即根据某一动作是最优动作的概率选择动作，
+
+$$
+\pi(a|h_t) = P[Q(a)>Q(a'),\forall a'\neq a|h_t]。
+\tag{12}
 $$
\ No newline at end of file
-- 
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