From ecd6e276f20f44b5f4376970c101aea8406af2a9 Mon Sep 17 00:00:00 2001
From: Yingjie Wang <phywyj@gmail.com>
Date: Thu, 9 Apr 2026 20:08:27 -0400
Subject: [PATCH] update: auto commit

---
 report.tex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/report.tex b/report.tex
index ddd632b..48f036c 100644
--- a/report.tex
+++ b/report.tex
@@ -257,7 +257,7 @@
     \begin{equation}
       \pdvt[2]{\phi} - \tensor{\delta}{^i^j} \Partial{i} \Partial{j} \phi = 0,
     \end{equation}
-    we can introduce $\pi := \pdvt{\phi}$ and $\tensor{\psi}{_i} := \Partial{_i} \phi$, and rewrite the wave equation as
+    we can introduce $\pi := \Partial{t} \phi$ and $\tensor{\psi}{_i} := \Partial{_i} \phi$, and rewrite the wave equation as
     \begin{equation}
       \begin{cases}
         \pdvt{\phi} = \pi, \\