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For questions about mathematical tiling.

10 votes
Accepted

Space-tiling convex prisms

tiles ${\bf Z}^d$ for some $d$: Vytautas Gruslys, Imre Leader, and Ta Sheng Tan: Tiling with arbitrary tiles. Proc. London Math. Soc. (2016) 112 (6): 1019-1039. …
Noam D. Elkies's user avatar
10 votes
Accepted

Is this an instance of any existing convex pentagonal tilings?

There are two questions here: Q1) Which convex pentagons tile the plane? Q2) What are all tilings of the plane by copies of a single convex pentagon? The Wikipedia page you cite concerns Question 1 …
Noam D. Elkies's user avatar
17 votes

Tiling the plane with incongruent isosceles triangles

Google soon finds that Q2 is problem C11 in Unsolved Problems in Geometry by Croft, Falconer, and Guy. But perhaps it's been solved during the intervening decades. URL
Noam D. Elkies's user avatar
37 votes
Accepted

Tiling the plane with incongruent isosceles triangles

T_1$ such that $T_1 - T_0$ is the union of three acute, non-isosceles triangles with circumradii distinct from each other and from $s$; likewise inscribe $T_1$ into $T_2$, and $T_2$ into $T_3$, etc., tiling … Now connect each of these triangles' vertices to its circumcenter to obtain a tiling of the plane by isosceles triangles any two of which have distinct repeated sides, and thus a fortiori are not congruent …
Noam D. Elkies's user avatar
17 votes

Tiling the plane with incongruent isosceles triangles

There are two choices at each stage, most of which yield a tiling of the plane; alternatively, choose the $T'_n$ and $T_n$ to all share a vertex with $T_0$, getting a geometric progression [sic] of triangles …
Noam D. Elkies's user avatar
14 votes
Accepted

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

This picture shows how $R$ is also the hexagonal tiling by copies of $H$ with every third hexagon removed. Hence three parallel copies of $R$ constitute a perfect $2$-covering of the plane. … H}-H$ and $R$, so we have our family of convex pentagons with a minimal tiling thickness of $2$. P.S. …
Noam D. Elkies's user avatar
20 votes
Accepted

A claim on partitioning a convex planar region into congruent pieces

This picture looks like a counterexample with $N=2$ and $R$ a convex pentagon: This should work more generally starting from an $n \times (n+1)$ rectangles for any integer $n>1$, removing two congrue …
Noam D. Elkies's user avatar