Regarding possible J code, the following link made me think of a possible way to create a tile. If I read the accompanying text correctly, there are two versions of the einstein tile. The left hand version is called "hat"; the right "turtle". Later comments suggest there are an infinite number of "similar" einstein tiles.
https://static01.nyt.com/images/2023/03/28/multimedia/28SCI-TILES-03-wmvf/28SCI-TILES-03-wmvf-jumbo.jpg?quality=75&auto=webp The full article link follows. https://www.nytimes.com/2023/03/28/science/mathematics-tiling-einstein.html -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
