Add \zero{R} for the additive identity element in R.

[mjotex.git] / mjo-algebra.tex

diff --git a/mjo-algebra.tex b/mjo-algebra.tex
index 36ad4bd64888c1b2926ff2d454c989e3a561a6aa..25b96d9f8a184edc051ed2867bc8fa9b4b0a269b 100644 (file)
--- a/mjo-algebra.tex
+++ b/mjo-algebra.tex
@@ -12,6 +12,18 @@
 \input{mjo-common} % for \of, and \binopmany
 
 
 \input{mjo-common} % for \of, and \binopmany
 
 

+% The additive identity element of its argument, which should be
+% an algebraic structure.
+\newcommand*{\zero}[1]{ 0_{{#1}} }
+
+\ifdefined\newglossaryentry
+  \newglossaryentry{zero}{
+    name={\ensuremath{\zero{R}}},
+    description={the additive identity element of $R$},
+    sort=z
+  }
+\fi
+

 % The multiplicative identity element of its argument, which should be
 % an algebraic structure.
 \newcommand*{\unit}[1]{ 1_{{#1}} }
 % The multiplicative identity element of its argument, which should be
 % an algebraic structure.
 \newcommand*{\unit}[1]{ 1_{{#1}} }