Proof Template

%
% Version 1: 9/24/13
%
\documentclass[letterpaper]{article}

\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amsthm}
\usepackage[colorinlistoftodos]{todonotes}
\usepackage{pifont}
\usepackage{mdframed,color}

\newtheoremstyle{statement}{3pt}{3pt}{}{}{\bfseries}{:}{.5em}{}

\theoremstyle{statement}
\newtheorem*{atmProp}{Proposition}

\newenvironment{atmProof}{\noindent\ignorespaces\paragraph{Proof:}}{\hfill \ding{122}\par\noindent}

%%%%% You should not need to edit anything above this line. %%%%%

\title{Proof Template} % Put the title of the assignment here...
\author{Your Name}     % ... and your name here.

\begin{document}

\maketitle

%%%%% You can copy the following segment of code for each proof in the assignment. %%%%%

\begin{mdframed}[
  leftmargin=1pt,
  innerleftmargin=10pt,
  innertopmargin=10pt,
  innerbottommargin=10pt,
  skipabove=15pt,
  skipbelow=15pt
]
\textbf{6b) Let $a$ and $b$ be rational numbers such that $\sqrt{ab}$ is irrational. Prove that $\sqrt{a}+\sqrt{b}$ is irrational.}
\end{mdframed}

\begin{atmProp}
Statement of proposition goes here.
\end{atmProp}

\begin{atmProof}
Proof of proposition goes here.
\end{atmProof}

%%%%%%%%%%



\end{document}