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Hofstadter's problem for curious readers

Logic in Computer Science 2018-04-18 v3 History and Overview

Abstract

This document summarizes the proofs made during a Coq development inSummer 2015. This development investigates the function G introducedby Hofstadter in his famous "G{\"o}del, Escher, Bach" bookas well as a related infinite tree. The left/right flipped variantof this G tree has also been studied here, followingHofstadter's "problem for the curious reader".The initial G function is refered as sequence A005206 inOEIS, while the flipped version is the sequence A123070.

Cite

@article{arxiv.1509.02479,
  title  = {Hofstadter's problem for curious readers},
  author = {Pierre Letouzey},
  journal= {arXiv preprint arXiv:1509.02479},
  year   = {2018}
}
R2 v1 2026-06-22T10:52:04.853Z