\RequirePackage[l2tabu, orthodox]{nag} % https://ctan.org/pkg/nag: Detecting and warning about obsolete LATEX commands
\RequirePackage{fix-cm} % https://ctan.org/pkg/fix-cm?lang=en: Permit Computer Modern fonts at arbitrary sizes
\documentclass[a4paper,11pt,oneside]{article}

%------------------------------------------------------------------------------
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}[section]
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{example}[theorem]{Example}

\theoremstyle{definition}
\newtheorem{definition}[theorem]{Definition}
\newtheorem{assumption}[theorem]{Assumption}

\theoremstyle{remark}
\newtheorem{remark}[theorem]{Remark}

%------------------------------------------------------------------------------
\title{Title}
\author{Author\thanks{Email}}
\date{\today}

\begin{document}

% \maketitle

% \tableofcontents
