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LaTeX package for typesetting Fitch-style proofs a la Language, Proof, 
and Logic, a logic textbook by Jon Barwise and John Etchemendy. It was 
originally written by John Etchemendy, with modifications by 
Dave Barker-Plummer and Richard Zach.



Run latex on lplfitch.ins to produce lplfitch.sty

Run latex on lplfitch.dxt to produce the documentation.


Copyright 2013 by John Etchemendy, Dave Barker-Plummer, and Richard Zach

This work may be distributed and/or modified under the
conditions of the LaTeX Project Public License, either version 1.3
of this license or (at your option) any later version.
The latest version of this license is in
and version 1.3 or later is part of all distributions of LaTeX
version 2005/12/01 or later.

This work has the LPPL maintenance status `maintained'.

The Current Maintainer of this work is Richard Zach.

This work consists of the files lplfitch.dtx and lplfitch.ins
and the derived files lplfitch.sty and lplfitch.pdf.


0.9 (2013/05/16) First public beta

Download the contents of this package in one zip archive (228.7k).

lplfitch – Fitch-style natural deduction proofs

The package provides macros for typesetting natural deduction proofs in “Fitch” style, with subproofs indented and offset by scope lines.

The proofs from use of the package are in the format used in the textbook “Language, Proof, and Logic” by Dave Barker-Plummer, Jon Barwise, and John Etchemendy. (In fact, the prefix “lpl” in the package name stands for “Language, Proof, and Logic”.)

LicensesThe Project Public License 1.3
Copyright2013 John Etchemendy, Dave Barker-Plummer, and Richard Zach
MaintainerRichard Zach
Contained inTeX Live as lplfitch
MiKTeX as lplfitch
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