\documentclass[12pt]{book}
\usepackage{lmodern}
\usepackage{eulervm}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{mathrsfs}
\usepackage{amsthm}
\usepackage{mathtools}
\usepackage{hyperref}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[french]{babel}
\usepackage[top=2cm, bottom=2cm, left=2cm, right=2cm]{geometry}
\usepackage{enumitem}
\usepackage{csquotes}
\usepackage[x11names]{xcolor}
\usepackage{framed, etoolbox}
\colorlet{framecolor}{VioletRed4}
\colorlet{shadecolor}{LavenderBlush2!60}
\usepackage{thmtools} %
\usepackage{sectsty}
\chapterfont{\color{Firebrick2}} % sets colour of chapters
\sectionfont{\color{Chartreuse4}}
\subsectionfont{\color{blue}}
%talwin majzo2at
%\usepackage{sectsty}%
%\chapterfont{\color{Firebrick2}}
%\usepackage{titlesec}%%%%%% <---------addendum
%\titleformat{\section}%%%%%% <---------addendum
%{\color{Chartreuse4}\normalfont\Large\bfseries}%%%%%% <---------addendum
%{\color{Chartreuse4}\thesection}{1.5em}{}%%%%%% <---------addendum
%\titleformat{\subsection}%%%%%% <---------addendum
%{\color{Firebrick3}\normalfont\Large\bfseries}%%%%%% <---------addendum
%{\color{Firebrick3}\thesection}{1.5em}{}%%%%%% <---------addendum
\makeatletter
\define@key{thmdef}{frame}[{}]{%
\thmt@trytwice{}{%
\RequirePackage{framed}%
\RequirePackage{thm-patch}%
\def\FrameCommand{\fcolorbox{framecolor}{shadecolor}}
\addtotheorempreheadhook[\thmt@envname]{%
\begin{framed}}%
\addtotheorempostfoothook[\thmt@envname]{\end{framed}}%
}%
}
\makeatother
\usepackage{thmtools}
\declaretheoremstyle[
spaceabove=-6pt,
spacebelow=6pt,
headfont=\normalfont\bfseries,
bodyfont = \normalfont,
postheadspace=1em,
qed=$\blacksquare$,
headpunct={:}]{myproofstyle} %<---- change this name
\declaretheorem[name={Proof}, style=myproofstyle, unnumbered]{Proof}
\declaretheoremstyle[
spaceabove=6pt,
spacebelow=6pt,
headfont=\bfseries,
notefont=\bfseries,
notebraces={(}{)},
bodyfont=\itshape,
postheadspace=1em,
headpunct={:}]{mystyle}
\declaretheoremstyle[
spaceabove=6pt,
spacebelow=6pt,
headfont=\normalfont\bfseries,
notefont=\mdseries\bfseries,
notebraces={({)}},
bodyfont=\normalfont,
postheadspace=1em,
postheadhook = {\hspace{0mm}\newline},%
headpunct={:},]{myst}
\declaretheorem[name={Théorème}, style=mystyle,numberwithin=section]{thm}
\declaretheorem[frame,name={Lemme}, style=mystyle,numberwithin=section]{lema}
\declaretheorem[frame,name={Définition}, style=mystyle,numberwithin=section]{defi}
\declaretheorem[frame,name={Corollaire}, style=mystyle,numberwithin=section]{coro}
\declaretheorem[frame,name={Proposition}, style=mystyle,numberwithin=section]{props}
\declaretheorem[frame,name={Vocabulaire}, style=mystyle,numberwithin=section]{voc}
\declaretheorem[name={Preuve}, style=myst,numbered=no]{preuve}
\declaretheorem[name={Remarque}, style=myst,numberwithin=section]{remark}
\declaretheorem[name={Remarques}, style=myst,numberwithin=section]{remarks}
\declaretheorem[name={Exemple}, style=myst,numberwithin=section]{exemple}
\declaretheorem[name={Exemples}, style=myst,numbered=no]{exemples}
\declaretheorem[name={Méthode}, style=mystyle,numberwithin=section]{methode}
\declaretheorem[name={Méthodes}, style=mystyle,numbered=no]{methodes}
\declaretheorem[name={Notation}, style=mystyle,numbered=no]{notation}
\AtBeginEnvironment{defi}{\colorlet{framecolor}{black}
\colorlet{shadecolor}{orange!15}}
\newcommand{\myarrow}[1][1cm]{\mathrel{%
\hbox{\rule[\dimexpr\fontdimen22\textfont2-.2pt\relax]{#1}{.4pt}}%
\mkern-4mu\hbox{\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\AtBeginEnvironment{voc}{\colorlet{framecolor}{black}
\colorlet{shadecolor}{LightSkyBlue2!25}}
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\AtBeginEnvironment{coro}{\colorlet{framecolor}{black}
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\AtBeginEnvironment{lema}{\colorlet{framecolor}{black}
\colorlet{shadecolor}{Yellow1!15}}
\makeatletter
\setbox0\hbox{$\xdef\scriptratio{\strip@pt\dimexpr
\numexpr(\sf@size*65536)/\f@size sp}$}
\newcommand{\myscriptarrow}[1][1cm]{{%
\hbox{\rule[\scriptratio\dimexpr\fontdimen22\textfont2-.2pt\relax]
{\scriptratio\dimexpr#1\relax}{\scriptratio\dimexpr.4pt\relax}}%
\mkern-4mu\hbox{\let\f@size\sf@size\usefont{U}{lasy}{m}{n}\symbol{41}}}}
\makeatother
\newcommand*{\QED}{\hfill\ensuremath{\blacksquare}}%Heron
\usepackage{amsmath,amscd}
\usepackage{mathtools}
\usepackage{dsfont}
\usepackage{enumitem}
\usepackage{textcomp}
\usepackage{tikz, tikz-cd}
\usepackage{amssymb}
\newlength{\leftbarwidth}
\newlength{\leftbarsep}
\newcommand*{\leftbarcolorcmd}{\color{leftbarcolor}}
\renewenvironment{leftbar}{
\def\FrameCommand{{\leftbarcolorcmd{
\vrule width \leftbarwidth \hspace{\leftbarsep}}}
\fboxsep=\FrameSep\colorbox{colorboxcolor}
}
\MakeFramed {\advance \hsize-\width \FrameRestore}
}{
\endMakeFramed}
\begin{document}
{\fontsize{68}{68} \selectfont Text}
deux sous-groupes
\chapter{Notion d'extension de corps }
\section{Extension d'anneau}
\begin{defi}
deux sous-groupes
Soit $A$ un anneau, on appel \textbf{\textcolor{blue}{extension}} de $A$ tout anneau $B$
tel que $A$ est une sous-anneau de $B$. Dans ce cas on note \textcolor{blue}{$B/A$} ou \textcolor{blue}{$B:A$} ou \textcolor{blue}{$A\myarrow B$}.
\end{defi}
\section{Extension de corps}
Maintenant on introduisant la notion d'extension de corps.
\begin{defi}
Étant donné un corps $K$, on appelle \textbf{\textcolor{blue}{extension}} de $K$ tout corps $L$ contenant $K$ et on note \textcolor{blue}{$L/K$} ou \textcolor{blue}{$L:K$} ou \textcolor{blue}{$K\myarrow L$}.
\end{defi}
\begin{exemples}
\newlist{coloritemize}{itemize}{1}
\setlist[coloritemize]{label=\textcolor{blue}{\textbullet}}
\begin{coloritemize}
\item Tout corps de caractéristique $0$ est une extension du corps $\mathds{Q}$.
En particulier, les inclusions $\mathds{Q} \subset \mathds{R}\subset \mathds{C}$ montrent que $\mathds{R}$ et $\mathds{C}$ sont extensions de $\mathds{Q}$ et que $\mathds{C}$ est extension de $\mathds{R}$.\\
Utilisons les notations donc on a : $\mathds{C}/\mathds{R}$, $\ \mathds{C}/\mathds{Q}$, $\ \mathds{R}/\mathds{Q}$.
\item Soit $L:=\{p+qi\ |\ (p,q)\in \mathds{Q}\times \mathds{Q}\ et\ i^2=-1 \}$.\\
On vérifie que $L$ est un sous-corps de $\mathds{C}$ contenant $\mathds{Q}$, donc L est une extension de $\mathds{Q}$, et, $\mathds{C}$ est une extension de $L$.
\end{coloritemize}
\end{exemples}
\end{document}
答案1
您可以使用该类memoir（该类的超集），它提供从到的book字体大小选项9pt60pt