From e5fe0cbdf3683582e9155a0f9143eca7139bad7e Mon Sep 17 00:00:00 2001
From: Michael Wimmer <m.t.wimmer@tudelft.nl>
Date: Tue, 15 Sep 2020 21:33:59 +0200
Subject: [PATCH] fix some formatting issues

---
 src/8_differential_equations_2.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/8_differential_equations_2.md b/src/8_differential_equations_2.md
index 33c4828..98f0965 100644
--- a/src/8_differential_equations_2.md
+++ b/src/8_differential_equations_2.md
@@ -518,7 +518,7 @@ possible approach is to try working in a different coordinate system. There are
 a few more analytic techniques available, however in many situations it becomes
 necessary to work with numerical methods of solution. 
 
-### Problems
+## Problems
 
 1.  [:grinning:] Which of the following equations for $y(x)$ is linear?
 
@@ -571,7 +571,7 @@ necessary to work with numerical methods of solution.
 
     Which of the following operators on this space is hermitian?
 
-    (a) Lf = A(x) \frac{d^2 f}{dx^2}
+    (a) $L = A(x) \frac{d^2 f}{dx^2}$
 
-    (b) Lf = \frac{d}{dx} \big{()} A(x) \frac{df}{dx} \big{)}
+    (b) $Lf = \frac{d}{dx} \big{()} A(x) \frac{df}{dx} \big{)}$
     
-- 
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