Add \abs and \norm to mjo-linear_algebra.

[mjotex.git] / mjo-linear_algebra.tex

diff --git a/mjo-linear_algebra.tex b/mjo-linear_algebra.tex
index 91cc42dc26850c9959e829da35bddc60408ff89c..955dd3a3347e4db45c5f251dba877a68acdd34a2 100644 (file)
--- a/mjo-linear_algebra.tex
+++ b/mjo-linear_algebra.tex
@@ -2,8 +2,17 @@
 % Standard operations from linear algebra.
 %
 
+% 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 }
 
@@ -36,3 +45,6 @@
 
 % The inverse of the adjoint of an operator (the argument).
 \newcommand*{\adjinv}[1]{ \left( {#1}^{*} \right)^{-1} }
+
+% An inline column vector, with parentheses and a transpose operator.
+\newcommand*{\colvec}[1]{ \left( {#1} \right)^{T} }