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Caption: Three models of hyperbolic geometry: the Klein-Beltrami model, the Poincare disk model, and the Poincare upper half-plane model.
Credit: Album / Universal Images Group / Encyclopaedia Britannica
Image size: 3825 × 3304 px | 36.2 MB
Print size: 32.4 × 28.0 cm | 1505.9 × 1300.8 in (300 dpi)