# Parabolic coordinates

From Encyclopedia of Mathematics

The numbers and related to rectangular Cartesian coordinates and by the formulas

where and . The coordinate lines are two systems of mutually orthogonal parabolas with oppositely-directed axes.

Figure: p071170a

The Lamé coefficients (or scale factors) are given by:

The area element is given by:

The fundamental operators of vector analysis are given by:

In parabolic coordinates the Laplace equation allows separation of variables.

#### Comments

Using complex functions the coordinate transformation can be described by , where and .

For parabolic coordinates in space see [a1].

#### References

[a1] | R. Sauer (ed.) I. Szabó (ed.) , Mathematische Hilfsmittel des Ingenieurs , 1 , Springer (1967) pp. 98 |

[a2] | L.D. Landau, E.M. Lifshits, "Mechanics" , Pergamon (1960) pp. 151ff (Translated from Russian) |

**How to Cite This Entry:**

Parabolic coordinates. D.D. Sokolov (originator),

*Encyclopedia of Mathematics.*URL: http://www.encyclopediaofmath.org/index.php?title=Parabolic_coordinates&oldid=15697

This text originally appeared in Encyclopedia of Mathematics - ISBN 1402006098