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  2. Tangent developable - Wikipedia

    en.wikipedia.org/wiki/Tangent_developable

    Tangent developable of a curve with zero torsion. The tangent developable is a developable surface; that is, it is a surface with zero Gaussian curvature.It is one of three fundamental types of developable surface; the other two are the generalized cones (the surface traced out by a one-dimensional family of lines through a fixed point), and the cylinders (surfaces traced out by a one ...

  3. File:Geometry for Elementary School.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Geometry_for...

    2007-04-25 18:16 Whiteknight 1275×1650× (1355429 bytes) A PDF version for [[Geometry for elementary school]], based on the print version of that book. Created by myself using PDF24. Created by myself using PDF24.

  4. Earl D. Rainville - Wikipedia

    en.wikipedia.org/wiki/Earl_D._Rainville

    Elementary Differential Equations, with Phillip E. Bedient, Macmillan, 1969. Eighth edition published by Prentice Hall, 1997, ISBN 0-13-508011-8 . A Short Course in Differential Equations , with Phillip E. Bedient, Macmillan, 1969.

  5. Four-vertex theorem - Wikipedia

    en.wikipedia.org/wiki/Four-vertex_theorem

    The four-vertex theorem was first proved for convex curves (i.e. curves with strictly positive curvature) in 1909 by Syamadas Mukhopadhyaya. [8] His proof utilizes the fact that a point on the curve is an extremum of the curvature function if and only if the osculating circle at that point has fourth-order contact with the curve; in general the osculating circle has only third-order contact ...

  6. G-structure on a manifold - Wikipedia

    en.wikipedia.org/wiki/G-structure_on_a_manifold

    In differential geometry, a G-structure on an n-manifold M, for a given structure group [1] G, is a principal G-subbundle of the tangent frame bundle FM (or GL(M)) of M.. The notion of G-structures includes various classical structures that can be defined on manifolds, which in some cases are tensor fields.

  7. Differential geometry - Wikipedia

    en.wikipedia.org/wiki/Differential_geometry

    Differential geometry finds applications throughout mathematics and the natural sciences. Most prominently the language of differential geometry was used by Albert Einstein in his theory of general relativity, and subsequently by physicists in the development of quantum field theory and the standard model of particle physics.

  8. Curvature of Riemannian manifolds - Wikipedia

    en.wikipedia.org/wiki/Curvature_of_Riemannian...

    In mathematics, specifically differential geometry, the infinitesimal geometry of Riemannian manifolds with dimension greater than 2 is too complicated to be described by a single number at a given point. Riemann introduced an abstract and rigorous way to define curvature for these manifolds, now known as the Riemann curvature tensor.

  9. Mean curvature flow - Wikipedia

    en.wikipedia.org/wiki/Mean_curvature_flow

    In the field of differential geometry in mathematics, mean curvature flow is an example of a geometric flow of hypersurfaces in a Riemannian manifold (for example, smooth surfaces in 3-dimensional Euclidean space).

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