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# Proof General — Organize your proofs!
Proof General is a generic Emacs interface for proof assistants.
The aim of the Proof General project is to provide a powerful, generic
environment for using interactive proof assistants.
This is version 4.4pre of Proof General.
## Setup
Remove old versions of Proof General, then download and install the new release from GitHub:
```
git clone https://github.com/ProofGeneral/PG ~/.emacs.d/lisp/PG
cd ~/.emacs.d/lisp/PG
make
```
Then add the following to your `.emacs`:
```
;; Open .v files with Proof General's Coq mode
(load "~/.emacs.d/lisp/PG/generic/proof-site")
```
If Proof General complains about a version mismatch, make sure that the shell's `emacs` is indeed your usual Emacs. If not, run the Makefile again with an explicit path to Emacs. On Mac in particular you'll probably need something like
```
make clean; make EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs
```
## More info
See
INSTALL for installation details.
COPYING for license details.
COMPATIBILITY for version compatibility information.
REGISTER for registration information (please register).
FAQ, doc/ for documentation of Proof General.
<prover>/README for additional prover-specific notes
Links:
Wiki: http://proofgeneral.inf.ed.ac.uk/wiki
Lists: http://proofgeneral.inf.ed.ac.uk/mailinglist
* Supported proof assistants: Coq, Isabelle, LEGO, PhoX
* Experimental (less useful): CCC,ACL2,HOL98,Hol-Light,Lambda-Clam,Shell,Twelf
* Obsolete instances: Demoisa,Lambda-Clam,Plastic
A few example proofs are included in each prover subdirectory. The
"root2" proofs of the irrationality of the square root of 2 were
proofs written for Freek Wiedijk's challenge in his comparison of
different theorem provers, see http://www.cs.kun.nl/~freek/comparison/.
Those proof scripts are copyright by their named authors.
(NB: most of these have rusted)
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