Put \ifx guards on most other package includes, too.

[mjotex.git] / mjo-linear_algebra.tex

diff --git a/mjo-linear_algebra.tex b/mjo-linear_algebra.tex
index d423a433e65030774141eac013cf95bbea2a1aa4..e2ae9fa5b18c008639db087142911ba51a6c10b0 100644 (file)
--- a/mjo-linear_algebra.tex
+++ b/mjo-linear_algebra.tex
@@ -5,14 +5,18 @@
 \def\havemjolinearalgebra{1}
 
 
-% Needed for \lvert, \rVert, etc. and \operatorname.
-\usepackage{amsmath}
+\ifx\lvert\undefined
+  \usepackage{amsmath} % \lvert, \rVert, etc. and \operatorname.
+\fi
 
-% Wasysym contains the \ocircle that we use in \directsumperp.
-\usepackage{wasysym}
+\ifx\ocircle\undefined
+  \usepackage{wasysym}
+\fi
 
-% Part of the adjustbox package; needed to clip the \perp sign.
-\usepackage{trimclip}
+\ifx\clipbox\undefined
+  % Part of the adjustbox package; needed to clip the \perp sign.
+  \usepackage{trimclip}
+\fi
 
 \input{mjo-common}