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Redundant Quadrapii

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Description

The body plans of the three creatures share symmetries of vertebrates, arthropods and echinoderms. But they all have appendages characteristic of cephalopods.

It is often assumed that "quadrapii" is a misspelling of "quadrapuses", "quadrapi" or "quadrapodes". But the singular form is "quadrapius" (not "quadrapus"). Also see plural forms of words ending in -us and latin words in the second declension.

A colored, non-periodic Thue-Morse sequence tiling.

Clifford Pickover used this image to illustrate the Thue-Morse sequence page of his wonderful "The Math Book: From Pythagoras to the 57th Dimension, 250 Milestones in the History of Mathematics".

Download for 2300 x 2300 px. version.

MATLAB, Space Software. Some details on its construction [broken link:, description and notes].


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timemit's avatar
neat tile, are the eyedots part of it or an add on?