Orthogonal coordinate systems | Three-dimensional coordinate systems

Toroidal coordinates

Toroidal coordinates are a three-dimensional orthogonal coordinate system that results from rotating the two-dimensional bipolar coordinate system about the axis that separates its two foci. Thus, the two foci and in bipolar coordinates become a ring of radius in the plane of the toroidal coordinate system; the -axis is the axis of rotation. The focal ring is also known as the reference circle. (Wikipedia).

Toroidal coordinates
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Related pages

Focus (geometry) | Elliptic integral | Bipolar coordinates | Laplace's equation | Law of cosines | Natural logarithm | Coordinate system | Orthogonal coordinates | Separation of variables | Whipple formulae | Helmholtz equation