plural of exotic sphere

Alternative spelling of celestial sphere

(mathematics) A sphere with a radius of 1 unit.

(mathematics) The arranging of non-overlapping spheres in space

plural of sphere of knowledge

(topology, complex analysis) The complex numbers extended with the number ∞; the complex plane (representation of the complex numbers as a Euclidean plane) extended with a single idealised point at infinity and consequently homeomorphic to a sphere in 3-dimensional Euclidean space.

(physics) A volume whose radius is the Debye length, in which there is a sphere of influence, and outside of which charges are electrically screened.

plural of Debye sphere

plural of armillary sphere

Alternative form of music of the spheres