From 9a901e8a95bce4ea889d766c22a93a7791f6a4e9 Mon Sep 17 00:00:00 2001
From: suda-yuga <yuga274274@gmail.com>
Date: Wed, 25 Jun 2025 11:40:44 +0900
Subject: [PATCH] Replace np.sum(a * b) with a @ b in
 lecture-python.myst.mccall_q.md

---
 lectures/mccall_q.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lectures/mccall_q.md b/lectures/mccall_q.md
index 0e8fcce6c..1be450e6e 100644
--- a/lectures/mccall_q.md
+++ b/lectures/mccall_q.md
@@ -171,7 +171,7 @@ class McCallModel:
         # Evaluate value for each state-action pair
         # Consider action = accept or reject the current offer
         accept = w[i] / (1 - β)
-        reject = c + β * np.sum(v * q)
+        reject = c + β * (v @ q)
 
         return np.array([accept, reject])