Example image of eyePlorer eyePlorer map for 'Non-Euclidean geometry': Riemann curvature tensor Elliptic geometry Euclidean geometry Hyperbolic geometry Parallel (geometry) Euclid Parallel postulate Absolute geometry Infinity Distance Perpendicular Riemannian geometry Bernhard Riemann Carl Friedrich Gauss Spacetime Klein bottle Möbius strip Greek mathematics Euclid's Elements Proposition Equivalence List of geometers Alhazen Giovanni Girolamo Saccheri Italy Mathematics in medieval Islam Nasir al-Din al-Tusi Omar Khayyám Persian people Proof by contradiction Lambert quadrilateral Quadrilateral Saccheri quadrilateral Alfonso Gersonides John Wallis Witelo Giordano Vitale Hungary János Bolyai Nikolai Lobachevsky Russia Abstract algebra Exterior algebra Hermann Grassmann Affine geometry Geometric calculus Projective geometry David Hestenes Curvature
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