synclastic
anticlastic
pseudosphere
umbilicus
Gaussian curvature
Gauss curvature
radius of curvature
geodesicity
Gaussian surface
shape operator
isocurvature
retrocurvature
concurvity
pseudoumbilical
cosmic singularity
umbilical
curvature
incurvature
normal
convexly
equiconvex
hyperboloid
triple point
Euler's formula
LQG
vector field
first fundamental form
Riemann space
point of inflection
parallelogram
nullsurface
orthometric
vertex
curvital
curvative
bowfront
Gaussianity
minimal surface
pseudo-Riemannian manifold
hyperbolic
crook
gryphosis
complementary function
concave
plagiogonal
root system
clothoid
evolute
Brahmagupta's formula
arctan