CLEVELAND, Ohio -- Tattooing is an ancient art that goes back centuries, with trends coming and going. One of today's rising motifs in the permanent-ink culture is scared geometry. This particular ...
Hyperbolic space is a Pringle-like alternative to flat, Euclidean geometry where the normal rules don’t apply: angles of a triangle add up to less than 180 degrees and Euclid’s parallel postulate, ...
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