X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-linear_algebra.tex;h=d423a433e65030774141eac013cf95bbea2a1aa4;hp=5c3f715744b14db7b4984b063952f02ba5ac530e;hb=fc7cfa7f3d02715cb09eae2e1c6bc501dc2d8d50;hpb=d4712abb88a2f342f31bbd60426d1a983df05ac2

diff --git a/mjo-linear_algebra.tex b/mjo-linear_algebra.tex
index 5c3f715..d423a43 100644
--- a/mjo-linear_algebra.tex
+++ b/mjo-linear_algebra.tex
@@ -1,6 +1,9 @@
 %
 % Standard operations from linear algebra.
 %
+\ifx\havemjolinearalgebra\undefined
+\def\havemjolinearalgebra{1}
+
 
 % Needed for \lvert, \rVert, etc. and \operatorname.
 \usepackage{amsmath}
@@ -99,3 +102,6 @@
 
 % Now declare an orthogonal direct sum in terms of \oplusperp.
 \newcommand*{\directsumperp}[2]{ {#1}\oplusperp{#2} }
+
+
+\fi