Fix list append.

1 files changed, 3 insertions, 0 deletions

diff --git a/main.tex b/main.tex
index 911399f..7a82b2b 100644
--- a/main.tex
+++ b/main.tex
@@ -165,6 +165,9 @@
 \newcommand\judgement[4][]{{#2} \vdash^{#1} {#3} : {#4}}
 \newcommand\jdgmnt[3]{{#2} \vdash {#3}~\mathrm{#1}}
 
+% List operators
+\newcommand\append{\mathbin{@}}
+
 %%% Term syntax
 
 %% Let