diff --git a/main/math.tex b/main/math.tex
index cdd9a6d..ce25eee 100644
--- a/main/math.tex
+++ b/main/math.tex
@@ -34,3 +34,6 @@
 \newcommand{\mbeq}{\overset{!}{=}}
 \newcommand{\lcm}{\text{lcm}}
 \newcommand{\limit}[2]{\lim_{#1 \rightarrow #2}}
+\DeclareMathOperator\arctanh{arctanh}
+\DeclareMathOperator\arccosh{arccosh}
+\DeclareMathOperator\arcsinh{arcsinh}