From 62939f351d1e79099f2053872d2e45fcf1087fe9 Mon Sep 17 00:00:00 2001
From: "T. van der Sar" <t.vandersar@tudelft.nl>
Date: Wed, 12 Feb 2020 09:18:43 +0000
Subject: [PATCH] Update 2_debye_model.md - typo fix

---
 src/2_debye_model.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/2_debye_model.md b/src/2_debye_model.md
index 9a87c74b..3fc73951 100644
--- a/src/2_debye_model.md
+++ b/src/2_debye_model.md
@@ -127,7 +127,7 @@ The easiest option people have invented so far is a box $L×L×L$ with **periodi
 Periodic boundary conditions imply that the atomic displacement $\mathbf{\delta r}$ is periodic. Let's consider a displacement by $L$ in the $x$-direction
 
 $$
-\mathbf{\delta r}(\mathbf{r} + L\mathbf{\hat{x}}) &= \mathbf{\delta r}(\mathbf{r})
+\mathbf{\delta r}(\mathbf{r} + L\mathbf{\hat{x}}) = \mathbf{\delta r}(\mathbf{r})
 $$
 To satisfy this equation, we arrive at the condition $k_x=p 2 \pi/L$]$, with $p= ..., -2, -1, 0, 1, 2$ in $\mathbb{Z}$.
 
-- 
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