bookshelf/Bookshelf/Enderton/Chapter_0.tex

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\input{../../preamble}

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  {./Chapter\_0.html\#Enderton.Chapter\_0.#1}
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\begin{document}

\header{Useful Facts About Sets}{Herbert B. Enderton}

\section{\proceeding{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 $x_1 = \langle y_1, \ldots, y_{k+1} \rangle$.

\begin{proof}

  \lean{lemma\_0a}

\end{proof}

\end{document}