@robertfathauer.bsky.social

I don’t recall ever seeing a toroidal box before. This one, at the Phoenix Art Museum, is a beauty. Chinese, Qing Dynasty (1650-1700), cloisonné enamel on bronze, for Buddhist prayer beads.

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Another √6-scaled fractal self-replicating tile. This one is based on a rhombic grid in which the grid cells have diagonals measuring 1 and √15/3.

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Using square- or triangle-based grids, there are no overlapping transformations of the grid for n = 6. By distorting a grid, for example stretching a square grid by √2, n=6 becomes allowed. Here a hexa-rectangle is used to form a fractal self-replicating tile.

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Wth Sujan Shrestha at the Computer Museum, in Hunt Valley, MD last week. This is one of around 70 Apple-1 computers whose whereabouts are known, out of around 200 total made.

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5-stars were commonly used on the ceilings of tombs and other buildings in Ancient Egypt to depict the heavens. They are usually not connected to one another, but they are connected in this ceiling in the Ptolemaic Denderah Temple to form a sort of tessellation of hexagons and quadrilaterals.

Ancient Egyptian ceiling with a star motif

Ancient Egyptian numbers used to track sacrifices on the side of the Temple of Ramesses III (1217 BC - 1155 BC) in Luxor. A vertical tick mark denotes 1 and an inverted U ten.

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Polyaboloes, polygons formed by joining isosceles right triangles in edge-to-edge fashion, can also be arranged iteratively to form fractal self-replicating tiles. A particular tetrabolo was used to form these two reptiles, with mirroring between successive iterations employed in the right one.

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