X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-common.tex;h=1e3c69f6b780a7fb00f7c362910981366db3c876;hp=61ea7c48e7cd8fe0d6ead881d37c5275330b6a0a;hb=cabf89f8e9b033a0a0d0e875886928f227798413;hpb=e9ac324f03959e7884df4339e31acf25053b3dde

diff --git a/mjo-common.tex b/mjo-common.tex
index 61ea7c4..1e3c69f 100644
--- a/mjo-common.tex
+++ b/mjo-common.tex
@@ -78,6 +78,10 @@
   \mathbb{C}\if\detokenize{#1}\detokenize{1}{}\else^{#1}\fi
 }
 
+% The space of symmetric n-by-n matrices.
+\providecommand*{\Sn}[1][n]{
+  \mathcal{S}\if\detokenize{#1}\detokenize{1}{}\else^{#1}\fi
+}
 
 %
 % Basic set operations