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Hofstadter's problem for curious readers

Pierre Letouzey 1, 2, *
* Corresponding author
2 PI.R2 - Design, study and implementation of languages for proofs and programs
PPS - Preuves, Programmes et Systèmes, Inria Paris-Rocquencourt, UPD7 - Université Paris Diderot - Paris 7, CNRS - Centre National de la Recherche Scientifique : UMR7126
Abstract : This document summarizes the proofs made during a Coq development in Summer 2015. This development investigates the function G introduced by Hofstadter in his famous "Gödel, Escher, Bach" book as well as a related infinite tree. The left/right flipped variant of this G tree has also been studied here, following Hofstadter's "problem for the curious reader". The initial G function is refered as sequence A005206 in OEIS, while the flipped version is the sequence A123070.
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Submitted on : Tuesday, October 20, 2015 - 1:26:15 AM
Last modification on : Tuesday, January 11, 2022 - 11:16:25 AM
Long-term archiving on: : Friday, April 28, 2017 - 8:04:03 AM


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  • HAL Id : hal-01195587, version 3
  • ARXIV : 1509.02479




Pierre Letouzey. Hofstadter's problem for curious readers. [Research Report] Université Paris Diderot; INRIA Paris-Rocquencourt. 2015, pp.29. ⟨hal-01195587v3⟩



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