bookshelf/Bookshelf/Enderton/Logic.tex

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\documentclass{report}
\input{../../preamble}
\makeleancommands{../..}
\begin{document}
\header{A Mathematical Introduction to Logic}{Herbert B. Enderton}
\tableofcontents
\begingroup
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\renewcommand\thechapter{R}
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\chapter{Reference}%
\hyperlabel{chap:reference}
\endgroup
% Reset counter to mirror Enderton's book.
\setcounter{chapter}{0}
\addtocounter{chapter}{-1}
\chapter{Useful Facts About Sets}%
\hyperlabel{chap:useful-facts-about-sets}
\section{\sorry{Lemma 0A}}%
\hyperlabel{sec:lemma-0a}
Assume that $\langle x_1, \ldots, x_m \rangle =
\langle y_1, \ldots, y_m, \ldots, y_{m+k} \rangle$.
Then $x_1 = \langle y_1, \ldots, y_{k+1} \rangle$.
\end{document}