[Tex/LaTex] Having chapters shown as numbers and roman letters

chaptersroman numerals

I am fairly new to LaTex and currently using it for writing a thesis.
In my paper I have a page for Preface, Acknowledgements and a list of used Abbreviations before my list of content. The list of content is followed by the Introduction to my thesis. The "issue" here, is that I want every chapter before my table of content to be listed as "Chapter I", "Chapter II" etc (Roman letters) while every chapter AFTER my Table of content to be shown as "Chapter 1", "Chapter 2" etc.

is there any way to do this?

MWE of how it currently works:

\documentclass{report}  
\usepackage[utf8]{inputenc}  
\usepackage{lipsum} % just for dummy text

\begin{document}  
\pagenumbering{arabic}  
\chapter{Abbreviations}  
\lipsum[1-2]  
\section{Some extra special abbreviations}  
\lipsum[1-2]  
\subsection{Some math}  
\lipsum[1-2]  
\tableofcontents  
\chapter{Introduction}  
\lipsum[1-2]  
\end{document}

The listed MWE is how it currently is, but what I want changed is the "Chapter 1" on the "Abbreviation" chapter. I would have that, and the sections/subsections in Roman letters, and have the "normal" numbering (Chapter 1, Section 1, subsection 1.1 etc) start at the "Introduction" chapter.

I know I can remove the chapter 1 part from the Abbreviations with 

\chapter*

but I'm still missing how to add the "Chapter II" instead.

Best Answer

Define \thechapter to do \Roman{chapter} in the frontmatter, then reset the chapter counter and redefine \thechapter to the standard \arabic{chapter}. I also add code for hyperref compatibility.

\documentclass{report}

\usepackage[utf8]{inputenc}

%\usepackage{hyperref} % if you want it

\usepackage{lipsum} % just for dummy text

% uncomment the following line if using hyperref
%\renewcommand{\theHchapter}{\arabic{chapter}\thechapter}

\begin{document}

\renewcommand{\thechapter}{\Roman{chapter}}

\chapter{Preface}
\lipsum[1-2]

\chapter{Acknowledgments}
\lipsum[1-2]

\chapter{Abbreviations}
\lipsum[1-2]

\section{Some extra special abbreviations}
\lipsum[1-2]

\subsection{Some math}
\lipsum[1-2]

\tableofcontents

\renewcommand{\thechapter}{\arabic{chapter}}
\setcounter{chapter}{0}

\chapter{Introduction}
\lipsum[1-2]

\end{document}

enter image description here

In order to get Roman numbers also for the subordinate counters, do

\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\thechapter.\Roman{section}}
\renewcommand{\thesubsection}{\thesection.\Roman{subsection}}

at the start and

\renewcommand{\thechapter}{\arabic{chapter}}
\renewcommand{\thesection}{\thechapter.\arabic{section}}
\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}
\setcounter{chapter}{0}

before Chapter 1.

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