mjo-convex: add \faceof and \properfaceof.

[mjotex.git] / mjo-convex.tex

diff --git a/mjo-convex.tex b/mjo-convex.tex
index 985731e68db59a8baacbbdd432b920d564daf1a0..a51011f4613ef1e0635d4f73e2b567b2afd3e598 100644 (file)
--- a/mjo-convex.tex
+++ b/mjo-convex.tex
@@ -24,3 +24,7 @@
 
 % The ``Extreme vectors'' (or ``Extreme directions'') operator.
 \newcommand*{\Ext}[1]{ \operatorname{Ext} \of{{#1}} }
+
+% The "is a face of" and "is a proper face of" relations.
+\newcommand*{\faceof}{ \trianglelefteq }
+\newcommand*{\properfaceof}{ \triangleleft }