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  2. n-ellipse - Wikipedia

    en.wikipedia.org/wiki/N-ellipse

    Examples of 3-ellipses for three given foci. The progression of the distances is not linear. In geometry, the n-ellipse is a generalization of the ellipse allowing more than two foci.

  3. Ellipse - Wikipedia

    en.wikipedia.org/wiki/Ellipse

    An ellipse (red) obtained as the intersection of a cone with an inclined plane. Ellipse: notations Ellipses: examples with increasing eccentricity. In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant.

  4. Matrix representation of conic sections - Wikipedia

    en.wikipedia.org/wiki/Matrix_representation_of...

    In mathematics, the matrix representation of conic sections permits the tools of linear algebra to be used in the study of conic sections.It provides easy ways to calculate a conic section's axis, vertices, tangents and the pole and polar relationship between points and lines of the plane determined by the conic.

  5. Finding Ellipses - Wikipedia

    en.wikipedia.org/wiki/Finding_Ellipses

    Finding Ellipses: What Blaschke Products, Poncelet’s Theorem, and the Numerical Range Know about Each Other is a mathematics book on "some surprising connections among complex analysis, geometry, and linear algebra", [1] and on the connected ways that ellipses can arise from other subjects of study in all three of these fields. [2]

  6. Ellipsoid - Wikipedia

    en.wikipedia.org/wiki/Ellipsoid

    An ellipsoid is a surface that can be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation.. An ellipsoid is a quadric surface; that is, a surface that may be defined as the zero set of a polynomial of degree two in three variables.

  7. Ellipses - Wikipedia

    en.wikipedia.org/wiki/Ellipses

    Ellipses is the plural form of two different English words: Ellipse, a type of conic section in geometry; Ellipsis, a three-dot punctuation mark (...) Ellipses may also refer to: Ellipses, a French publication under the direction of Aymeric Chauprade

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