English

A $\sigma$-morphic convex protoset

Combinatorics 2025-07-29 v1

Abstract

We say that a tile is σ\sigma-morphic if it tiles the plane in exactly 0\aleph_0 many noncongruent ways (up to an isometry). It is an unsolved problem of whether a σ\sigma-morphic tile exist in the plane. In this note we present a construction of a set of convex tiles that is σ\sigma-morphic. The result is interesting since all the constructions of σ\sigma-morphic sets of tiles that arise in the literature make use of bumps and nicks, which necessarily make the tiles non-convex. We construct our set by cleverly dividing the tiles of the set of tiles discovered by Schmitt into convex tiles so that they behave in the same manner.

Keywords

Cite

@article{arxiv.2507.20867,
  title  = {A $\sigma$-morphic convex protoset},
  author = {Aleksa Džuklevski},
  journal= {arXiv preprint arXiv:2507.20867},
  year   = {2025}
}

Comments

14 pages, 8 figures

R2 v1 2026-07-01T04:22:11.341Z