anticlastic
pseudosphere
synclastic
concave function
Gaussian curvature
nullsurface
closed form
skew-symmetric
antiplane
shape operator
diagonal matrix
point of inflection
homogeneous space
trapezoid
umbilicus
minimal surface
inviscid
curvative
root system
Gauss curvature
Kodaira vanishing theorem
projective variety
quadrangulation
bispheric
double bubble conjecture
Murasugi sum
paracomposition
Fréchet surface
hyperbolic
double-convex
Klein geometry
taper
Belyi's theorem
Metzlerian
defective matrix
standard topology
ovalling
convexoconvex
convexity
agonic line
isocurvature
ellipsoid
centroid
Zeuthen-Segre invariant
singular matrix
planoconvex
ruled surface
hyperbolic geometry
affine variety
generator