[Tex/LaTex] Fancy Chapter Styles in LaTeX

chapterssectioning

How can I produce a fancy chapter enter image description herelike this one?

Best Answer

Here is a solution, using the  block style. Some parameter values may have to be adjusted if you use another basic font size or another font:

\documentclass[a4paper, 0pt,french]{book}%
\usepackage{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{babel}%
\usepackage{fourier, erewhon, cabin}
\usepackage{microtype}
\usepackage[pagestyles, clearempty, explicit]{titlesec}
\usepackage{eqparbox}
\usepackage{lipsum}%
\titleformat{\chapter}[block]{}{\eqmakebox[chap]{\Large\MakeUppercase{\sffamily\lsstyle\chaptername} %
\raisebox{-0.6\height}{\fontsize{50pt}{50pt}\selectfont\thechapter}\quad}}%
{0pt}{\huge\bfseries\raisebox{1ex}{\parbox[t]{\dimexpr\textwidth-\eqboxwidth{chap}\relax}{\titlerule[2pt]\vspace{1.25ex}#1}}}
\titlespacing*{\chapter}{0pt}{-32pt}{48pt}%

\begin{document}

\setcounter{chapter}{1}
\chapter{Problème parabolique\\ semi-linéaire dégénéré}

\lipsum[1-6]

\end{document} 

enter image description here