File:Concertina tesseract; concertina cubes, lower.png

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Each side of the tetrahedron is the projection of a concertina cube.
Each edge of the tetrahedron is the projection of a concertina square two of them have in common.
The vertex all four of them have in common is the projection center and not shown. Neither are the edges leading to it.

Concertina cube and its 2D shadow


The POV-Ray source is on GitHub.

Image sets Concertina tesseract; tetrahedral shadow; cells
and Concertina tesseract cells (rank and face colors)
2 × 4 concertina cubes 2 × 4 trigonal trapezohedra 2 × 12 right rhombic prisms 6 squared rh. dodecahedra
12 concertina square prisms

 
This image was created with POV-Ray.
 
This file was uploaded with Commonist.

v:Formulas in predicate logic#4 places

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Watchduck
You can name the author as "T. Piesk", "Tilman Piesk" or "Watchduck".

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current20:48, 12 April 2018Thumbnail for version as of 20:48, 12 April 20183,624 × 3,990 (1.6 MB)Watchduck (talk | contribs)

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