updated macros

macros.tex

@@ -37,6 +37,7 @@
 \newcommand{\vm}[1]{ \mathbf{#1}}
 \newcommand{\va}{{\bf a}}
 \newcommand{\vb}{{\bf b}}
+\newcommand{\vc}{\mathbf{c}}
 \newcommand{\vo}{{\bf o}}
 \newcommand{\vr}{{\bf r}}
 \newcommand{\vt}{{\bf t}}
@@ -45,6 +46,9 @@
 \newcommand{\vy}{{\bf y}}
 \newcommand{\vz}{{\bf z}}
 \newcommand{\vmu}{{\bf \mu}}
+\newcommand{\wij}{w_{ij}}                       % poids w_ij
+
+\newcommand{\half}{\frac{1}{2}}         % fraction un demi
 
 \newcommand*\colvec[1]{\begin{bmatrix}#1\end{bmatrix}}
 

mycolors.tex

@@ -24,8 +24,8 @@
 \definecolor{liumlightgray}{rgb}{0.9,0.9,0.9}
 \newcommand{\liumlightgray}[1]{{\color{liumlightgray} #1}}
 
-\newcommand{\myemph}[1]{\liumcyan{\textbf{#1}}}
-\newcommand{\myemphb}[1]{\orange{\textbf{#1}}}
+\newcommand<>{\myemph}[1]{\alt#2{\liumcyan{\textbf{#1}}}{#1}}
+\newcommand<>{\myemphb}[1]{\alt#2{\orange{\textbf{#1}}}{#1}}
 
 \newcommand<>{\mycolor}[2]{%
   \alt#3{{\color{#1}{#2}}}{#2}%