\documentclass[12pt]{article}\pagestyle{myheadings}
%Enter your last name, the portfolio problem number, and the draft number.
\title{Last Name Problem x -- Draft y}
\author{}
%Enter your last name, the portfolio problem number, and the draft number. This will be a heading on pages after the first page.
\markright{ Last Name: Problem x -- Draft y}
\usepackage{amsmath,amssymb,amsthm,amsfonts,graphics}
%The following commands allow us to typeset theorems, propositions, definitions, etc.
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem*{definition}{Definition}
\renewcommand{\qedsymbol}{\ensuremath{\blacksquare}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\Z}{\mathbb{Z}}
\newcommand{\Q}{\mathbb{Q}}
\newcommand{\R}{\mathbb{R}}
\newcommand{\C}{\mathbb{C}}
\begin{document}
\maketitle
%Enter your email address.
\begin{center}
\textbf{email address: }
\end{center}
\end{document}
