the left is the standard Euclid's orchard, an infinite product with the arcsin with nifty branch cuts, and on the right, the vertex set from the quasicrystalline rhombus tiling from http://fpmrt.riken.jp/public_html/sakai/penrose.html …
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in mpmath, this is the arcsin product: a = 3.0/pi b = sqrt(3)/2 r = fp.nprod(lambda m: a*fp.asin(b+q**m), [1,100])
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