Elliptic point
= Elliptic point
{wiki}
An elliptic point of a surface is a point at which the <Gaussian curvature> is positive, equivalently where the two <principal curvature>[principal curvatures] have the same nonzero sign.
= Elliptic point
{wiki}
An elliptic point of a surface is a point at which the <Gaussian curvature> is positive, equivalently where the two <principal curvature>[principal curvatures] have the same nonzero sign.