X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-linear_algebra.tex;h=7f2484a546ef750977ca2b4c1ab7ae451a66f122;hp=a534523765ef1fd20f7729af25836bb2075fcd3e;hb=HEAD;hpb=66a672c6c1657ad96422fcdb4828bc5d9a108ab0

diff --git a/mjo-linear_algebra.tex b/mjo-linear_algebra.tex
index a534523..5f25544 100644
--- a/mjo-linear_algebra.tex
+++ b/mjo-linear_algebra.tex
@@ -89,6 +89,16 @@
   }
 \fi
 
+% The reduced row-echelon form of its argument, a matrix.
+\newcommand*{\rref}[1]{\operatorname{rref}\of{#1}}
+\ifdefined\newglossaryentry
+  \newglossaryentry{rref}{
+    name={\ensuremath{\rref{A}}},
+    description={the reduced row-echelon form of $A$},
+    sort=r
+  }
+\fi
+
 % The ``Automorphism group of'' operator.
 \newcommand*{\Aut}[1]{ \operatorname{Aut}\of{{#1}} }
 
@@ -164,4 +174,8 @@
 \fi
 
 
+% The general linear group of square matrices whose size is the first
+% argument and whose entries come from the second argument.
+\newcommand*{\GL}[2]{\operatorname{GL}_{#1}\of{#2}}
+
 \fi