diff --git a/src/math/mathop.pysty b/src/math/mathop.pysty
index 4a0c668..cad5a42 100644
--- a/src/math/mathop.pysty
+++ b/src/math/mathop.pysty
@@ -149,6 +149,7 @@ __END_OPTIONS_X__
 \DeclareCategory{AffVar}
 \DeclareCategory{Alg}
 \DeclareCategory{Field}
+\DeclareCategory{Sch}
 
 %Set theory
 \DeclareSimpleMathOperator{card}
@@ -173,6 +174,12 @@ __END_OPTIONS_X__
 \DeclareSimpleMathOperator{Supp}
 \DeclareSimpleMathOperator{Ann}
 \DeclareSimpleMathOperator{OC}
+\DeclareSimpleMathOperator{red}
+\DeclareSimpleMathOperator{can}
+\DeclareSimpleMathOperator{Pic}
+
+\newcommand\leftadjoint\vdash
+\newcommand\rightadjoint\dashv
 
 % Characteristic function
 \newcommand*{\cfun}{\ensuremath{\mathbbm{1}}}