X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-algebra.tex;fp=mjo-algebra.tex;h=71ba6221a1b9f0859fcbcb1530a251f7234e93af;hp=4f3f79cd5dab03694d66be516bb4b157c7c1e1c9;hb=17fd11a2ac39c8d20680a61279efed7bd18f93f2;hpb=42bef52e8272b97d0fae6243dd7621b793086e28

diff --git a/mjo-algebra.tex b/mjo-algebra.tex
index 4f3f79c..71ba622 100644
--- a/mjo-algebra.tex
+++ b/mjo-algebra.tex
@@ -9,6 +9,11 @@
   \usepackage{amsopn}
 \fi
 
+% The (sub)algebra generated by its argument, a subset of some ambient
+% algebra. By definition this is the smallest subalgebra (of the
+% ambient one) containing that set.
+\newcommand*{\alg}[1]{\operatorname{alg}\of{{#1}}}
+
 % The fraction field of its argument, an integral domain. The name
 % "Frac" was chosen here instead of "Quot" because the latter
 % corresponds to the term "quotient field," which can be mistaken in