Oblique Rectification Numbers for Polyaboloes

Introduction

A polyabolo or polytan is a plane figure formed by joining equal isosceles right triangles edge to equal edge.

In issue 14 of Rodolfo M. Kurchan's Puzzle Fun, Gustavo Piñeiro defines the rectification number of a polyomino as the least number of cells that can be left vacant when copies of the polyomino are packed in a rectangle. Here I investigate the same problem for polyaboloes, using oblique rectangles instead of orthogonal rectangles.

In the results below, I omit polyaboloes that can be obliquely rectified—that is, that can tile some oblique rectangle. Such polyaboloes have Rectification Number 0.

Thanks to Joyce Michel for suggesting this variant.

See also Rectification Numbers for Polyaboloes.

Diaboloes

4 Vacant Cells

6 Vacant Cells

Triaboloes

1 Vacant Cell

2 Vacant Cells

4 Vacant Cells

Tetraboloes

4 Vacant Cells

8 Vacant Cells

12 Vacant Cells

Pentaboloes

2 Vacant Cells

3 Vacant Cells

4 Vacant Cells

6 Vacant Cells

7 Vacant Cells

11 Vacant Cells

Hexaboloes

2 Vacant Cells

4 Vacant Cells

6 Vacant Cells

8 Vacant Cells

10 Vacant Cells

12 Vacant Cells

18 Vacant Cells

Heptaboloes

1 Vacant Cell

2 Vacant Cells

4 Vacant Cells

5 Vacant Cells

6 Vacant Cells

8 Vacant Cells

9 Vacant Cells

10 Vacant Cells

12 Vacant Cells

15 Vacant Cells

17 Vacant Cells

Last revised 2023-09-09.


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Col. George Sicherman [ HOME | MAIL ]