: Mathematics: elliptic coordinates

geometry > analytic geometry > coordinate system > elliptic coordinates

elliptic coordinates

In geometry, the elliptic coordinate system is a two-dimensional orthogonal coordinate system in which the coordinate lines are confocal ellipses and hyperbolae. The two foci ${\\displaystyle F_{1}}$ and ${\\displaystyle F_{2}}$ are generally taken to be fixed at ${\\displaystyle -a}$ and ${\\displaystyle +a}$ , respectively, on the ${\\displaystyle x}$ -axis of the Cartesian coordinate system.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Elliptic_coordinate_system)

http://data.loterre.fr/ark:/67375/PSR-N7SSGKLN-0

RDF/XML TURTLE JSON-LD Last modified 10/18/24

Loterre