Use the "amsfonts" package for \mathbb in mjo-common.tex.

diff --git a/mjo-common.tex b/mjo-common.tex
index f96528eac1acc710babe3ec790219d5babfab4bd..5c0162a76b575e8336bad47740cdeec47f90d1c7 100644 (file)
--- a/mjo-common.tex
+++ b/mjo-common.tex
@@ -2,6 +2,9 @@
 % Only the most commonly-used macros. Needed by everything else.
 %
 
+% Needed for \mathbb.
+\usepackage{amsfonts}
+
 % Place the argument in matching left/right parntheses.
 \providecommand*{\of}[1]{ \left({#1}\right) }