from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The
hyperbolic plane, viewed as a disk so that Euclideancircles and lines Euclidean- perpendicularto the disk's surface are hyperbolic lines.
from Wiktionary, Creative Commons Attribution/Share-Alike License
After Henri Poincaré. This definition is lacking an etymology or has an incomplete etymology. You can help Wiktionary by giving it a proper etymology.
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