Bispherical

Bispherical
represents the bispherical coordinate system with default variables Uu, Vv, and Pphi and default parameter value 1.

Bispherical[u, v,

]
represents the bispherical coordinate system with variables u, v, and

and default parameter value 1.

Bispherical[u, v,

, a]
represents the bispherical coordinate system with variables u, v, and

and parameter a.

To use Bispherical, you first need to load the Vector Analysis Package using Needs["VectorAnalysis`"].

Needs["VectorAnalysis`"]

Use Bispherical as the default coordinate system: