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Non-monotileable amenable groups

This is crossposted from MSE. We say a subset $A$ of a group $G$ is a monotile for $G$ if $G$ is a disjoint union of right translates of $A$. In his article Monotileable Amenable Groups, B. Weiss ...
Saúl RM's user avatar
  • 10.6k
11 votes
1 answer
475 views

Examples of games developed purposely to analyze players' strategies for mathematics research

Background This question is about games that were created, developed, deployed and popularized1 by researchers because they wanted to learn more about some mathematical structure, and did so by ...
Max Lonysa Muller's user avatar
4 votes
0 answers
304 views

References and upper bounds for the SONNAT tiling game?

Introduction In a video released about a month ago, Pembesita describes1 a tiling game called SONNAT: Same Orientation Neighbour Not Allowed, Tiling. In the single-player game2, the player may employ ...
Max Lonysa Muller's user avatar
2 votes
2 answers
131 views

Reference request: Cut-and-project method gives rise to a fiber bundle over the torus

I apologize in advance for how vague this request is. A few weeks ago, I came upon a paper that (if I recall correctly) proves that the hull of a cut-and-project tiling is a fiber bundle over a torus. ...
Kyle's user avatar
  • 243
3 votes
2 answers
397 views

An "incomplete" tiling?

Given an $m\times n$ chess board, we place $p$ $2\times 1$ dominoes on the board so that they don't overlap. How many ways can we place them? When each square of the board is covered by a domino this ...
JJJZZZZZ's user avatar
  • 380
1 vote
2 answers
103 views

A variation of domino tiling problem with fusions

I know several specific variations of the domino tiling problem has been determined to be decidable or undecidable, such as the seed domino problem. I have a variation which I have not been able to ...
Keen-ameteur's user avatar
2 votes
1 answer
129 views

Reference on relation between SFTs and Wang-tiles

I've been looking at several papers which allude to a relation between SFTs. Namely, given an SFT $\Omega \subseteq \mathcal{A}^{\mathbb{Z}^2}$ with allowed patches $\mathcal{F}$, we can associate a ...
Keen-ameteur's user avatar
21 votes
0 answers
453 views

Does every 5-celled animal tile the plane?

An animal in the plane is a finite set of grid-aligned unit squares in $\mathbb{R}^2$. (The definition is the same as a polyomino, but where we relax the connectivity requirement.) One may ...
RavenclawPrefect's user avatar
0 votes
0 answers
140 views

Graph theory: Closed neighourhoods and generalized clustering coefficients

The neighbourhood of node $v$ in graph $G$ is the subgraph of $G$ induced by all vertices adjacent to $v$. The number of edges between neighbours divided by the number of pairs of neighbours is ...
Hans-Peter Stricker's user avatar
1 vote
2 answers
232 views

What does the extension theorem for tilings state?

I have seen several references to the so-called Extension Theorem in the context of tilings of Euclidean space. E.g. in "The Local Theorem for Monotypic Tilings" one reads The Extension Theorem [......
M. Winter's user avatar
  • 13.6k
5 votes
0 answers
150 views

monomer-dimer tiling of a Young diagram

As a modest start, I propose the below problem for a special set of partitions. Perhaps it is known. Let $\lambda_n=(n,n-1,\dots,2,1)$ be the staircase partition and its corresponding Young diagram $...
T. Amdeberhan's user avatar
6 votes
2 answers
424 views

A class of tilings with amazing visual qualities

For more examples please see my related question on MSE: Interesting tiling with a lot of symmetrical shapes This is achieved by rotation of square grid over itself by atan(3/4). Resulting ...
Mikhail V's user avatar
  • 161
4 votes
2 answers
207 views

Classification of symmetries of tilings in surfaces?

Is there a general study of the symmetries of tilings on surfaces? Conway, Goodman-Strauss & Burgiel classified them on $\mathbb S^2, \mathbb R^2$ and $\mathbb H^2$, with their 'Magic Theorem'. ...
Melquíades Ochoa's user avatar
9 votes
2 answers
2k views

How to divide a square into three similar rectangles

Preparing some exercises for my High School pupils I came across this question: How can you tile a square into three similar (ie., same shape, different size) rectangles? With a bit of algebra it can ...
TecnoGrial's user avatar
4 votes
1 answer
549 views

Tiling with restricted overlap

Non-overlapping tilings of regions is a well-studied topic. I wonder if the following variant has been considered: A tile can be partitioned into several regions, where such regions from different ...
Per Alexandersson's user avatar
9 votes
4 answers
902 views

quasicrystal and penrose tiling, mathematical introduction

Starting to research on quasicrystal from material science, I want to know more about how to understand quasicrystal from a purely mathematical (especially tiling) perspective (probably start from ...
user40780's user avatar
  • 867
11 votes
1 answer
406 views

Thinnest 2-fold coverings of the plane by congruent convex shapes

It is an unsolved problem to determine the "thinnest" $2$-fold covering of the plane by disks. The $2$-fold coverage problem by disks is to find the minimum number of congruent (unit-radius) disks ...
Joseph O'Rourke's user avatar
5 votes
2 answers
382 views

What is known about tiling a rectangle in an irreducible way by smaller rectangles?

Given two naturals $s<t$. Is there always a square (or at least a bigger rectangle) that can be tiled with $s\times t$ rectangles in an irreducible way (i.e. any grid line splitting it cuts at ...
Wolfgang's user avatar
  • 13.4k
10 votes
2 answers
803 views

Reference for Wang tile

I am working on projects in solving ground state of generalized Ising models. One recent work involves tiling with basic tiles that filled the whole lattice. For example, we could obtain results: ...
user40780's user avatar
  • 867
15 votes
0 answers
573 views

Relation Between Truncated Braid Groups and Regular Tilings of the Complex and Hyperbolic Plane

This is perhaps a vague question, but hopefully there exists literature on the subject. The question is motivated by an answer I gave to this question on math.SE. There exists a rather remarkable ...
Dan Rust's user avatar
  • 715
17 votes
1 answer
457 views

The sparsest planar net that captures every unit segment

Let $\cal C = \lbrace C_i \rbrace$ be a collection of rectifiable curves in the plane with the property that every unit-length segment meets at least one curve in at least one point. Call such a ...
Joseph O'Rourke's user avatar
10 votes
2 answers
678 views

Name this periodic tiling

I've been working on a problem I'm working on in ergodic theory (finding Alpern lemmas for measure-preserving $\mathbb R^d$ actions) and have found some neat tilings, that I presume were previously ...
Anthony Quas's user avatar
  • 23.2k
15 votes
2 answers
737 views

Tiling survey that updates "Tilings and patterns"?

Can anyone suggest a survey (or surveys) that provides an update to Tilings and patterns by Grunbaum and Shepard? If there's a more recent book, that would be fantastic, but I don't see one. I am ...
Aaron Sterling's user avatar
47 votes
1 answer
13k views

Lecture notes by Thurston on tiling

I am looking for a copy of the following W. Thurston, Groups, tilings, and finite state automata, AMS Colloquium Lecture Notes. I see that a lot of papers in the tiling literature refer to it but I ...
Vagabond's user avatar
  • 1,795