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  2. Paraboloidal coordinates - Wikipedia

    en.wikipedia.org/wiki/Paraboloidal_coordinates

    Paraboloidal coordinates are three-dimensional orthogonal coordinates (,,) that generalize two-dimensional parabolic coordinates. They possess elliptic paraboloids as one-coordinate surfaces. As such, they should be distinguished from parabolic cylindrical coordinates and parabolic rotational coordinates , both of which are also generalizations ...

  3. Parabolic coordinates - Wikipedia

    en.wikipedia.org/wiki/Parabolic_coordinates

    The three surfaces intersect at the point P (shown as a black sphere) with Cartesian coordinates roughly (1.0, -1.732, 1.5). The two-dimensional parabolic coordinates form the basis for two sets of three-dimensional orthogonal coordinates. The parabolic cylindrical coordinates are produced by projecting in the -direction. Rotation about the ...

  4. Paraboloid - Wikipedia

    en.wikipedia.org/wiki/Paraboloid

    In a suitable coordinate system, a hyperbolic paraboloid can be represented by the equation [2] [3] =. In this position, the hyperbolic paraboloid opens downward along the x -axis and upward along the y -axis (that is, the parabola in the plane x = 0 opens upward and the parabola in the plane y = 0 opens downward).

  5. Parabolic cylindrical coordinates - Wikipedia

    en.wikipedia.org/wiki/Parabolic_cylindrical...

    These surfaces intersect at the point P (shown as a black sphere), which has Cartesian coordinates roughly (2, -1.5, 2). In mathematics, parabolic cylindrical coordinates are a three-dimensional orthogonal coordinate system that results from projecting the two-dimensional parabolic coordinate system in the perpendicular -direction.

  6. Parabolic reflector - Wikipedia

    en.wikipedia.org/wiki/Parabolic_reflector

    (See "Parabola#In a cartesian coordinate system".) Correspondingly, the dimensions of a symmetrical paraboloidal dish are related by the equation: 4 F D = R 2 {\textstyle 4FD=R^{2}} , where F {\textstyle F} is the focal length, D {\textstyle D} is the depth of the dish (measured along the axis of symmetry from the vertex to the plane of the rim ...

  7. Category:Orthogonal coordinate systems - Wikipedia

    en.wikipedia.org/wiki/Category:Orthogonal...

    Pages in category "Orthogonal coordinate systems" The following 20 pages are in this category, out of 20 total. ... Paraboloidal coordinates; Polar coordinate system;

  8. Sheriff's deputy who killed Sonya Massey to be released soon ...

    www.aol.com/sheriffs-deputy-killed-sonya-massey...

    A former sheriff's deputy who gunned down Sonya Massey in her kitchen after she called 911 about a possible prowler outside her home will be released soon with conditions, an Illinois court ruled ...

  9. Baer function - Wikipedia

    en.wikipedia.org/wiki/Baer_function

    The Baer wave equation is a generalization which results from separating variables in the Helmholtz equation in paraboloidal coordinates: ... Coordinate Systems, ...