# First-Order Logic According to Monk #

[This directory](https://bitbucket.org/isafol/isafol/src/master/FOL_Monk/) contains an ongoing Isabelle formalization of
Donald Monk's axiomatic system for first-order logic that he described as "the simplest known formulation of ordinary logic"
(_The Substitutionless Predicate Logic_, Archiv f. Math. Logik und Grundlagenforschung 7, 102-121, 1965).

See also:

A. Halkjær From, John Bruntse Larsen, Anders Schlichtkrull and Jørgen Villadsen:
*Substitutionless First-Order Logic: A Formal Soundness Proof*
http://sketis.net/isabelle/isabelle-workshop-2018

https://github.com/logic-tools/less


## Authors ##

* [Asta Halkjær Boserup](mailto:asfr shtrudel di.ku.dk)
* [John Bruntse Larsen](mailto:jobla shtrudel dtu.dk)
* [Anders Schlichtkrull](mailto:andschl shtrudel dtu.dk)
* [Jørgen Villadsen](mailto:jovi shtrudel dtu.dk)
