English

Domino Tiling Congruence Modulo 4

Combinatorics 2009-05-12 v2

Abstract

The number of domino tilings of a region with reflective symmetry across a line is combinatorially shown to depend on the number of domino tilings of particular subregions, modulo 4. This expands upon previous congruency results for domino tilings, modulo 2, and leads to a variety of corollaries, including that the number of domino tilings of a k x 2k rectangle is congruent to 1 mod 4.

Keywords

Cite

@article{arxiv.0705.1300,
  title  = {Domino Tiling Congruence Modulo 4},
  author = {Bridget Eileen Tenner},
  journal= {arXiv preprint arXiv:0705.1300},
  year   = {2009}
}
R2 v1 2026-06-21T08:26:38.657Z