# First-Order Logic According to Berghofer #

[This directory](https://bitbucket.org/isafol/isafol/src/master/FOL_Berghofer/) contains an ongoing Isabelle formalization of
first-order logic based on Stefan Berghofers [AFP entry](https://www.isa-afp.org/entries/FOL-Fitting.shtml) and my own [AFP entry](https://www.isa-afp.org/entries/FOL_Seq_Calc1.html).

Natural Deduction and the Isabelle Proof Assistant.  
Jørgen Villadsen, A. Halkjær From and Anders Schlichtkrull.
Post-proceedings of the 6th International Workshop on Theorem proving components for Educational software (ThEdu'17).  
[http://eptcs.org/content.cgi?ThEdu19](http://eptcs.org/content.cgi?ThEdu17)

Natural Deduction Assistant (NaDeA).  
Jørgen Villadsen, A. Halkjær From and Anders Schlichtkrull.
Post-proceedings of the 7th International Workshop on Theorem proving components for Educational software (ThEdu'18).  
[http://eptcs.org/content.cgi?thedu18](http://eptcs.org/content.cgi?thedu18)


## Author ##

* [Asta Halkjær Boserup](mailto:asfr shtrudel di.ku.dk)

Contributors: Alexander Birch Jensen, Anders Schlichtkrull, and Jørgen Villadsen
