diff --git a/src/8_differential_equations_2.md b/src/8_differential_equations_2.md
index 8ca93796212078ad654a8b4175432ffb449a7c80..35b5cde963326f94822e5ce9feaf50608dc74375 100644
--- a/src/8_differential_equations_2.md
+++ b/src/8_differential_equations_2.md
@@ -272,7 +272,7 @@ derivative.
 
 For the Schrödinger equation, we could supply the initial conditions
 
-$$\psi(x,0)= \psi_0(x) \& \ \psi(0,t) = \psi(L, t) = 0 \text{for all $t$}.$$
+$$\psi(x,0)=\psi_0(x) \& \psi(0,t) = \psi(L, t) = 0 \text{for all $t$}.$$
 
 This particular set of boundary conditions corresponds to a particle in a box,
 a situation which is used as the base model for many derivations in quantum