SpeedOfSound is the speed of sound at sea level in the standard atmosphere.
VacuumPermeability is the permeability of vacuum, a universal constant.
VacuumPermittivity is the permittivity of vacuum, a universal constant.
WeakMixingAngle is a physical constant.
NumberOfEdges[polytope] gives the number of edges of polytope.
NumberOfFaces[polytope] gives the number of faces of polytope.
NumberOfVertices[polytope] gives the number of vertices of polytope.
AbsIJK
(Quaternions Package Symbol) AbsIJK[q] gives the absolute value of the pure quaternion part of q.
AdjustedSignIJK[q] gives the sign of the pure quaternion part of q, adjusted so its first nonzero component is positive.