Isoperimetric inequality for sphere and ellipsoid is discussed, and the isoperimetric inequality of some region satisfying certain conditions is given.
The material, which includes spherical, ellipsoidal, and dumbbell-shaped glass beads as well as colloidal items with a porous structure and sputtering material in fluid form, have also been found.
These dense lumps of rock bump out from the ellipsoid and their mass gravitationally attracts oceans, while valleys in the ocean floor have less mass and the oceans flow away, shallower.