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+
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+
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+
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\begin{document}
+\chapter{Data model}
+
\input{notation.tex}
\input{invariants.tex}
\input{lemmas.tex}
\input{create-tip.tex}
\input{anticommit.tex}
\input{merge.tex}
+
+\chapter{Merge strategy}
+
\input{strategy.tex}
\end{document}