From 5ed7553b723a9724f55e75261efe2666e75df725 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Tue, 8 Nov 2022 18:14:21 +0100
Subject: The tweaks and fixes never stop

---
 source/know/concept/ion-sound-wave/index.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'source/know/concept/ion-sound-wave')

diff --git a/source/know/concept/ion-sound-wave/index.md b/source/know/concept/ion-sound-wave/index.md
index cb86c04..8749f1a 100644
--- a/source/know/concept/ion-sound-wave/index.md
+++ b/source/know/concept/ion-sound-wave/index.md
@@ -95,16 +95,16 @@ we make the following plane-wave ansatz:
 
 $$\begin{aligned}
     n_{i1}(\vb{r}, t)
-    &= n_{i1} \exp\!(i \vb{k} \cdot \vb{r} - i \omega t)
+    &= n_{i1} \exp(i \vb{k} \cdot \vb{r} - i \omega t)
     \\
     n_{e1}(\vb{r}, t)
-    &= n_{e1} \exp\!(i \vb{k} \cdot \vb{r} - i \omega t)
+    &= n_{e1} \exp(i \vb{k} \cdot \vb{r} - i \omega t)
     \\
     \vb{u}_{i1}(\vb{r}, t)
-    &= \vb{u}_{i1} \exp\!(i \vb{k} \cdot \vb{r}  - i \omega t)
+    &= \vb{u}_{i1} \exp(i \vb{k} \cdot \vb{r}  - i \omega t)
     \\
     \phi_1(\vb{r}, t)
-    &= \phi_1 \,\,\exp\!(i \vb{k} \cdot \vb{r} - i \omega t)
+    &= \phi_1 \,\,\exp(i \vb{k} \cdot \vb{r} - i \omega t)
 \end{aligned}$$
 
 Which we then insert into the momentum equations for the ions and electrons:
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