Replace all uses of \providecommand with \newcommand.

[mjotex.git] / mjo-algebra.tex

diff --git a/mjo-algebra.tex b/mjo-algebra.tex
index d70d9fd919fa1d39da8036953c03b3d52ce27426..88523456235e4bde91b99d9f99f1fcd41280588c 100644 (file)
--- a/mjo-algebra.tex
+++ b/mjo-algebra.tex
@@ -1,3 +1,10 @@
+%
+% Abstract algebraic structures.
+%
+\ifx\havemjoalgebra\undefined
+\def\havemjoalgebra{1}
+
+
 % Needed for \operatorname.
 \usepackage{amsopn}
 
@@ -11,3 +18,6 @@
 % coefficients is the first argument and whose indeterminates (a
 % comma-separated list) are the second argumnt.
 \newcommand*{\polyring}[2]{{#1}\left[{#2}\right]}
+
+
+\fi