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Formalising foundations of mathematics†

Published online by Cambridge University Press:  01 July 2011

MIHNEA IANCU  and
FLORIAN RABE
MIHNEA IANCU
Affiliation:
Computer Science, Jacobs University Bremen, Bremen, Germany Email: m.iancu@jacobs-university.de; f.rabe@jacobs-university.de
FLORIAN RABE
Affiliation:
Computer Science, Jacobs University Bremen, Bremen, Germany Email: m.iancu@jacobs-university.de; f.rabe@jacobs-university.de
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Abstract

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Over recent decades there has been a trend towards formalised mathematics, and a number of sophisticated systems have been developed both to support the formalisation process and to verify the results mechanically. However, each tool is based on a specific foundation of mathematics, and formalisations in different systems are not necessarily compatible. Therefore, the integration of these foundations has received growing interest. We contribute to this goal by using LF as a foundational framework in which the mathematical foundations themselves can be formalised and therefore also the relations between them. We represent three of the most important foundations – Isabelle/HOL, Mizar and ZFC set theory – as well as relations between them. The relations are formalised in such a way that the framework permits the extraction of translation functions, which are guaranteed to be well defined and sound. Our work provides the starting point for a systematic study of formalised foundations in order to compare, relate and integrate them.

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