\documentclass[11pt,a4paper]{article}
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\usepackage{isabelle,isabellesym}
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\begin{document}
\title{An Isabelle/HOL formalisation of Green's Theorem}
\author{Mohammad Abdulaziz and Lawrence C.\ Paulson}
\maketitle
\begin{abstract}
We formalise a statement of Green’s theorem---the first formalisation to
our knowledge---in Isabelle/HOL. The theorem statement that we formalise
is enough for most applications, especially in physics and
engineering. Our formalisation is made possible by a novel proof that
avoids the ubiquitous line integral cancellation argument. This
eliminates the need to formalise orientations and region boundaries
explicitly with respect to the outwards-pointing normal vector.
Instead we appeal to a homological argument about equivalences between
paths.
\end{abstract}
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\section{Acknowledgements}
Paulson was supported by the ERC Advanced Grant ALEXANDRIA (Project 742178) funded by the European Research Council
at the University of Cambridge, UK.
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\end{document}
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