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Definition of Poincaré disk
1. Noun. The hyperbolic plane, viewed as a disk so that Euclidean circles and lines Euclidean-perpendicular to the disk's surface are hyperbolic lines. ¹
¹ Source: wiktionary.com
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1. Noun. The hyperbolic plane, viewed as a disk so that Euclidean circles and lines Euclidean-perpendicular to the disk's surface are hyperbolic lines. ¹
¹ Source: wiktionary.com