From ec4f08ce7089e080f8f1afd7d566d400651dfbca Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Tue, 8 Mar 2016 16:30:20 -0500
Subject: [PATCH] Add \abs and \norm to mjo-linear_algebra.

---
 mjo-linear_algebra.tex | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mjo-linear_algebra.tex b/mjo-linear_algebra.tex
index b077288..955dd3a 100644
--- a/mjo-linear_algebra.tex
+++ b/mjo-linear_algebra.tex
@@ -2,11 +2,17 @@
 % Standard operations from linear algebra.
 %
 
-% Needed for \operatorname.
-\usepackage{amsopn}
+% Needed for \lvert, \rVert, etc. and \operatorname.
+\usepackage{amsmath}
 
 \input{mjo-common}
 
+% Absolute value (modulis) of a scalar.
+\newcommand*{\abs}[1]{ \left\lvert {#1} \right\rvert }
+
+% Norm of a vector.
+\newcommand*{\norm}[1]{ \left\lVert {#1} \right\rVert }
+
 % The inner product between its two arguments.
 \newcommand*{\ip}[2]{ \langle {#1}, {#2} \rangle }
 
-- 
2.44.2