Assertion: curvature | /r/HasProperty | variable
Facets:
Source sentences:
text: (a=6,\ b=3)$, the curvature is given by $${ab\over (a^2\sin^2 \theta+ b^2\cos^2 \theta)^{3/2}}.$$A perfect sphere has constant curvature everywhere on the surface whereas the curvature on other surfaces is variable.