\usepackage{thmtools, thm-restate}
\usepackage{multirow}
\usepackage{algorithm2e}
+\usepackage{mathtools}
+
%\declaretheorem{theorem}
%%--------------------
\def \P {\mathbb{P}}
\def \ov {\overline}
\def \ts {\tau_{\rm stop}}
-
+\def\rl{{^{.}}}
+
+\DeclarePairedDelimiter\abs{\lvert}{\rvert}%
+\DeclarePairedDelimiter\norm{\lVert}{\rVert}%
+
+% Swap the definition of \abs* and \norm*, so that \abs
+% and \norm resizes the size of the brackets, and the
+% starred version does not.
+\makeatletter
+\let\oldabs\abs
+\def\abs{\@ifstar{\oldabs}{\oldabs*}}
+%
+\let\oldnorm\norm
+\def\norm{\@ifstar{\oldnorm}{\oldnorm*}}
+\makeatother
\newtheorem{theorem}{Théorème}
\newtheorem{lemma}{Lemme}
\chapter{Une démarches plus classique de dissimulation: STABYLO}
\input{stabylo}
-\chapter{Une démarches plus classique de dissimulation: STABYLO}
- \input{stabylo}
+\chapter{Schéma de stéganographie: les dérivées du second ordre}
+ \input{stegoyousra}