https://github.com/dmxlarchey/the-tortoise-and-the-hare

The Tortoise and the Hare in Coq. Constructive extraction via Bar inductive predicates (see README.md below).
https://github.com/dmxlarchey/the-tortoise-and-the-hare

brent coq coq-formalization cycle-detection floyd hare tortoise

Last synced: about 1 month ago
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The Tortoise and the Hare in Coq. Constructive extraction via Bar inductive predicates (see README.md below).

• Host: GitHub
• URL: https://github.com/dmxlarchey/the-tortoise-and-the-hare
• Owner: DmxLarchey
• License: other
• Created: 2018-01-30T15:02:10.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2018-07-09T22:44:51.000Z (almost 7 years ago)
• Last Synced: 2025-02-16T14:27:10.546Z (3 months ago)
• Topics: brent, coq, coq-formalization, cycle-detection, floyd, hare, tortoise
• Language: Coq
• Homepage:
• Size: 46.9 KB
• Stars: 1
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE_CeCILL_V2-en.txt

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README

        
# The Tortoise and the Hare in Coq

        (**************************************************************)

        (*   Copyright Dominique Larchey-Wendling [*]                 *)

        (*                                                            *)

        (*                             [*] Affiliation LORIA -- CNRS  *)

        (**************************************************************)

        (*      This file is distributed under the terms of the       *)

        (*         CeCILL v2 FREE SOFTWARE LICENSE AGREEMENT          *)

        (**************************************************************)

## What is this repository for

* This repository contains the Coq source code that comes as a companion to the paper [*Proof Pearl: Constructive Extraction of Cycle Finding Algorithms*](http://www.loria.fr/~larchey/papers/ITP_2018_paper_16.pdf) by [Dominique Larchey-Wendling](http://www.loria.fr/~larchey). The paper has been accepted for presentation at ITP 2018.

## How do I set it up

* Use Coq 8.6 (preferably). The code also compiles with Coq 8.5pl[23]. But **not under Coq 8.7** (see below). 

* To compile, type `make all`. Then one can visit the individual proof files `*.v`

* Beware that `Extraction` will fail with Coq 8.7+ because `Require Extraction` should be included before extraction takes place. This is an unfortunate incompatibility introduced in Coq 8.7. 

* If using Coq 8.7 is nonetheless important, the rest of the code should work ok, so simply add `Require Extraction` where it is needed.