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Journal of Automated Reasoning

, Volume 55, Issue 3, pp 257–268 | Cite as

Definitional Expansions in Mizar

In memoriam of Andrzej Trybulec, a pioneer of computerized formalization
  • Artur Korniłowicz
Open Access
Article
First Online:

Abstract

The Mizar Verifier uses definitional expansions for controlling proof structures. In this paper we propose another use of definitional expansions—enriching verified inferences by expansions of definitions of formulae included in the inferences and increasing the number of premises accessible by Checker. This introduces more knowledge to the reasoning, which helps to draw more conclusions. Some statistics about influence of such expansions on the Mizar Mathematical Library are presented.

Keywords

Proof assistant Formal verification Definitional expansion Mizar 
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© The Author(s) 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Institute of InformaticsUniversity of BiałystokBiałystokPoland

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