X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=mjo-common.tex;h=8dae2cff42f0d75693f2a01b3c853c74b526ef9b;hb=a32b270207ddd934668e5197d4222113c66ae6ee;hp=40a7d6c243f657f2f2d1809709bacded8499d74d;hpb=11c5394107f7501b64b073d1ed8161720a91c2f3;p=mjotex.git

diff --git a/mjo-common.tex b/mjo-common.tex
index 40a7d6c..8dae2cf 100644
--- a/mjo-common.tex
+++ b/mjo-common.tex
@@ -23,6 +23,9 @@
 % A pair of things.
 \providecommand*{\pair}[2]{ \left( {#1}, {#2} \right) }
 
+% The Cartesian product of two things.
+\providecommand*{\cartprod}[2]{ {#1} \times {#2} }
+
 %
 % Product spaces
 %
@@ -32,6 +35,11 @@
 % will be omitted entirely.
 %
 
+% The natural n-space, N x N x N x ... x N.
+\providecommand*{\Nn}[1][n]{
+  \mathbb{N}\if\detokenize{#1}\detokenize{1}{}\else^{#1}\fi
+}
+
 % The integral n-space, Z x Z x Z x ... x Z.
 \providecommand*{\Zn}[1][n]{
   \mathbb{Z}\if\detokenize{#1}\detokenize{1}{}\else^{#1}\fi