Add \triple for a three-tuple of things, (a,b,c).

diff --git a/mjo-common.tex b/mjo-common.tex
index 0a9a5d206941c55346153e22bc0b41a8c7cc4510..efa10a26045d9f199bd3bdb1f8c9f5ec97c1cb19 100644 (file)
--- a/mjo-common.tex
+++ b/mjo-common.tex
@@ -23,6 +23,9 @@
 % A pair of things.
 \providecommand*{\pair}[2]{ \left({#1},{#2}\right) }
 
+% A triple of things.
+\providecommand*{\triple}[3]{ \left({#1},{#2},{#3}\right) }
+
 % The Cartesian product of two things.
 \providecommand*{\cartprod}[2]{ {#1}\times{#2} }