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\title{\includegraphics[scale=0.5]{isabelle_hol} \\[4ex]

  Isabelle's Logics: HOL%

  \thanks{The research has been funded by the EPSRC (grants GR/G53279,

    GR\slash H40570, GR/K57381, GR/K77051, GR/M75440), by ESPRIT (projects 3245:

    Logical Frameworks, and 6453: Types) and by the DFG Schwerpunktprogramm

    \emph{Deduktion}.}}

\author{Tobias Nipkow\footnote

{Institut f\"ur Informatik, Technische Universit\"at M\"unchen,

 \texttt{nipkow@in.tum.de}} and

Lawrence C. Paulson\footnote

{Computer Laboratory, University of Cambridge, \texttt{lcp@cl.cam.ac.uk}} and

Markus Wenzel\footnote

{Institut f\"ur Informatik, Technische Universit\"at M\"unchen,

 \texttt{wenzelm@in.tum.de}}}

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\begin{abstract}

  This manual describes Isabelle's formalization of Higher-Order Logic, a

  polymorphic version of Church's Simple Theory of Types.  HOL can be best

  understood as a simply-typed version of classical set theory.  The monograph

  \emph{Isabelle/HOL --- A Proof Assistant for Higher-Order Logic} provides a

  gentle introduction on using Isabelle/HOL in practice.

\end{abstract}

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