metageometry
metageometrician
Euclideanism
affine geometry
noneuclidean geometry
Riemann
Georg Friedrich Bernhard Riemann
Bernhard Riemann
elliptic geometry
Riemannian geometry
inversive geometry
Euclidean axiom
Euclidian space
Euclid's axiom
Euclid's postulate
differentiable manifold
imaginary geometry
compact space
Euclideanness
autometry
n space
absolute geometry
root system
tropical geometry
taxicab geometry
pseudoangle
non-Euclidean geometry
nonconvexity
quasifield
central simple algebra
nonorthogonality
simplex
solid torus
orthant
convex combination
geometricity
Lobachevsky
Euclidean plane
plane curve
Nikolai Ivanovich Lobachevsky
Nikolai Lobachevsky
quantum
Cartesian space
cubinvariant
k-cell