English

A Comment on Budach's Mouse-in-an-Octant Problem

Formal Languages and Automata Theory 2013-09-24 v2

Abstract

Budach's Mouse-in-an-Octant Problem (attributed to Lothar Budach in a 1980 article by van Emde Boas and Karpinski) concerns the behaviour of a very simple finite-state machine ("the mouse") moving on the integer two-dimensional grid. Its decidability is apparently still open. This note sketches a proof that an extended version of the problem (a super-mouse) is undecidable.

Cite

@article{arxiv.1305.0911,
  title  = {A Comment on Budach's Mouse-in-an-Octant Problem},
  author = {Amir M. Ben-Amram},
  journal= {arXiv preprint arXiv:1305.0911},
  year   = {2013}
}

Comments

3 pages, 2 bibliographic references

R2 v1 2026-06-22T00:11:27.864Z