Add S^{n}, the space of symmetric n-by-n matrices.

diff --git a/mjo-common.tex b/mjo-common.tex
index 61ea7c48e7cd8fe0d6ead881d37c5275330b6a0a..1e3c69f6b780a7fb00f7c362910981366db3c876 100644 (file)
--- 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

diff --git a/mjo-cone.tex b/mjo-cone.tex
index b770d753ec3ad8855a0ab91081550ee106737056..b7bcdab9c9dbe236fecb0142638ed136aac69e07 100644 (file)
--- a/mjo-cone.tex
+++ b/mjo-cone.tex
@@ -24,7 +24,7 @@
 \newcommand*{\Lnplus}[1][n]{ \mathcal{L}^{{#1}}_{+} }
 
 % The PSD cone in a space of symmetric matrices.
-\newcommand*{\Snplus}[1][n]{ \mathcal{S}^{{#1}}_{+} }
+\newcommand*{\Snplus}[1][n]{ \Sn[#1]_{+} }
 
 % The PSD cone in a space of Hermitian matrices.
 \newcommand*{\Hnplus}[1][n]{ \mathcal{H}^{{#1}}_{+} }