From 7c2d27ca89c5b096694b950c766e50df2dc87001 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sat, 8 Jan 2022 14:09:13 +0100
Subject: Minor fixes, rename "Ion Sound Wave" and "Ito Process"

---
 content/know/concept/hellmann-feynman-theorem/index.pdc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'content/know/concept/hellmann-feynman-theorem/index.pdc')

diff --git a/content/know/concept/hellmann-feynman-theorem/index.pdc b/content/know/concept/hellmann-feynman-theorem/index.pdc
index 3b88cd8..1d2fe82 100644
--- a/content/know/concept/hellmann-feynman-theorem/index.pdc
+++ b/content/know/concept/hellmann-feynman-theorem/index.pdc
@@ -74,7 +74,7 @@ to minimize energies with respect to $\lambda$:
 $$\begin{aligned}
     \boxed{
         \nabla_\lambda E_n
-        = \matrixel{\psi_m}{\nabla_\lambda \hat{H}}{\psi_n}
+        = \matrixel{\psi_n}{\nabla_\lambda \hat{H}}{\psi_n}
     }
 \end{aligned}$$
 
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