---
language:
  - en
license: mit
tags:
  - collatz-conjecture
  - isabelle
  - isabelle-hol
  - theorem-proving
  - formal-verification
  - mathematics
  - information-theory
---

# Collatz Isabelle

This repository contains an Isabelle/HOL formalization of information-theoretic barriers for trace-based proof strategies for the Collatz conjecture.

## Related Paper

Craig Alan Feinstein,

"The Collatz 3n+1 Conjecture is Unprovable"

arXiv:
https://arxiv.org/abs/math/0312309

## Source Code

GitHub Repository:

https://github.com/cafeinst/CollatzConjecture

## Archive

Zenodo:

https://doi.org/10.5281/zenodo.18294701

## Contents

* Isabelle/HOL theory files
* Machine-checked formalization
* PDF documentation

## Citation

If you use this material, please cite the arXiv paper and the Zenodo archive.