diff --git a/sections/twists.tex b/sections/twists.tex
@@ -224,8 +224,8 @@ Denote \(\Homeo^+(S, \partial S)_{x_1, \ldots, x_n} = \{\phi \in \Homeo^+(S,
\arraycolsep=1.4pt
\begin{array}{ccrcl}
\Homeo^+(S, \partial S)_{x_1, \ldots, x_n}
- & \to & \Homeo^+(S, \partial S)
- & \to & C(S, n) \\
+ & \hookrightarrow & \Homeo^+(S, \partial S)
+ & \relbar\joinrel\twoheadrightarrow & C(S, n) \\
& & \phi & \mapsto & [\phi(x_1), \ldots, \phi(x_n)]
\end{array}
\]