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 and are generally taken to be fixed at and, respectively, on the -axis of the Cartesian coordinate system.
Read more about Elliptic Coordinate System: Basic Definition, Scale Factors, Alternative Definition, Alternative Scale Factors, Extrapolation To Higher Dimensions, Applications
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“As long as learning is connected with earning, as long as certain jobs can only be reached through exams, so long must we take this examination system seriously. If another ladder to employment was contrived, much so-called education would disappear, and no one would be a penny the stupider.”
—E.M. (Edward Morgan)