mjo-convex: add \faceof and \properfaceof.

[mjotex.git] / examples.tex

diff --git a/examples.tex b/examples.tex
index ef9a0d56f9a29c78a58d6b4cf8534a96ab746731..a1605c11bd311340a5212754fe0cc7453220f662 100644 (file)
--- a/examples.tex
+++ b/examples.tex
@@ -99,7 +99,9 @@
     The conic hull of a set $X$ is $\cone{X}$; its affine hull is
     $\aff{X}$, and its convex hull is $\conv{X}$. If $K$ is a cone,
     then its lineality space is $\linspace{K}$, its lineality is
-    $\lin{K}$, and its extreme directions are $\Ext{K}$.
+    $\lin{K}$, and its extreme directions are $\Ext{K}$. The fact that
+    $F$ is a face of $K$ is denoted by $F \faceof K$; if $F$ is a
+    proper face, then we write $F \properfaceof K$.
   \end{section}
 
   \begin{section}{Font}