• differential geometry, the curvature form describes curvature of a connection on a principal bundle. The Riemann curvature tensor in Riemannian geometry...
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  • In mathematics, curvature is any of several strongly related concepts in geometry that intuitively measure the amount by which a curve deviates from being...
    44 KB (6,448 words) - 01:09, 20 November 2024
  • the manifold a symmetric bilinear form (Besse 1987, p. 43). Broadly, one could analogize the role of the Ricci curvature in Riemannian geometry to that of...
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  • Thumbnail for Curvature of Riemannian manifolds
    introduced an abstract and rigorous way to define curvature for these manifolds, now known as the Riemann curvature tensor. Similar notions have found applications...
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  • f12 = Ez/c, f23 = −Bz, or equivalent definitions. This form is a special case of the curvature form on the U(1) principal bundle on which both electromagnetism...
    66 KB (9,953 words) - 23:35, 18 November 2024
  • The main tensorial invariant of a connection form is its curvature form. In the presence of a solder form identifying the vector bundle with the tangent...
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  • geometry, the sectional curvature is one of the ways to describe the curvature of Riemannian manifolds. The sectional curvature K(σp) depends on a two-dimensional...
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  • In mathematics, the mean curvature H {\displaystyle H} of a surface S {\displaystyle S} is an extrinsic measure of curvature that comes from differential...
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  • In the mathematical field of differential geometry, the Riemann curvature tensor or Riemann–Christoffel tensor (after Bernhard Riemann and Elwin Bruno...
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  • Thumbnail for Gaussian curvature
    Gaussian curvature or Gauss curvature Κ of a smooth surface in three-dimensional space at a point is the product of the principal curvatures, κ1 and κ2...
    19 KB (2,632 words) - 08:54, 18 November 2024
  • Thumbnail for Torsion tensor
    Torsion tensor (redirect from Torsion form)
    Z\right)+R\left(T\left(X,Y\right),Z\right)\right)=0} The curvature form is the gl(n)-valued 2-form Ω = D ω = d ω + ω ∧ ω {\displaystyle \Omega =D\omega =d\omega...
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  • metric whose curvature form ω is positive (since ω is then a Kähler form that represents the first Chern class of L in H2(X, Z)). The Kähler form ω that satisfies...
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  • curvature of an affine connection or covariant derivative (on tensors); the curvature form of an Ehresmann connection: see Ehresmann connection, connection (principal...
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  • Thumbnail for Principal curvature
    geometry, the two principal curvatures at a given point of a surface are the maximum and minimum values of the curvature as expressed by the eigenvalues...
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  • \mathbf {Q} )} can be presented as differential forms which depend polynomially on the curvature form of a vector bundle. This Chern–Weil theory revealed...
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  • Thumbnail for Vertebral column
    (thoracic and sacral curvatures) form during fetal development. The secondary curves develop after birth. The cervical curvature forms as a result of lifting...
    43 KB (5,310 words) - 16:02, 19 November 2024
  • mathematical field of Riemannian geometry, the scalar curvature (or the Ricci scalar) is a measure of the curvature of a Riemannian manifold. To each point on a...
    35 KB (5,029 words) - 23:36, 30 May 2024
  • equal to the integral of a certain polynomial (the Euler class) of its curvature form (an analytical invariant). It is a highly non-trivial generalization...
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  • Thumbnail for Möbius strip
    strip without its boundary, called an open Möbius strip, can form surfaces of constant curvature. Certain highly symmetric spaces whose points represent lines...
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  • fundamental form Gauss–Codazzi–Mainardi equations Dupin indicatrix Asymptotic curve Curvature Principal curvatures Mean curvature Gauss curvature Elliptic...
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  • Thumbnail for Earth radius
    and measure the Earth's radius involve either the spheroid's radius of curvature or the actual topography. A few definitions yield values outside the range...
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  • {\displaystyle P\times ^{G}W} . The curvature form of a principal G-connection ω is the g {\displaystyle {\mathfrak {g}}} -valued 2-form Ω defined by Ω = d ω + 1...
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  • Thumbnail for Shape of the universe
    defined primarily by its curvature, while the global geometry is characterised by its topology (which itself is constrained by curvature). General relativity...
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  • represented in a parametrized form, and their geometric properties and various quantities associated with them, such as the curvature and the arc length, are...
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  • In differential geometry, the Weyl curvature tensor, named after Hermann Weyl, is a measure of the curvature of spacetime or, more generally, a pseudo-Riemannian...
    10 KB (1,742 words) - 17:55, 29 January 2024
  • In Riemannian geometry, the geodesic curvature k g {\displaystyle k_{g}} of a curve γ {\displaystyle \gamma } measures how far the curve is from being...
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  • in terms of connections and curvature representing classes in the de Rham cohomology rings of M. That is, the theory forms a bridge between the areas of...
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  • }\wedge \sigma .} A flat connection is one whose curvature form vanishes identically. The curvature form has a local description called Cartan's structure...
    45 KB (8,674 words) - 19:49, 24 October 2024
  • nondegenerate bilinear form over g {\displaystyle {\mathfrak {g}}} (if G is semisimple, the Killing form will do) and F is the curvature form F ≡ d A + A ∧ A...
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  • In differential geometry, a one-form (or covector field) on a differentiable manifold is a differential form of degree one, that is, a smooth section of...
    5 KB (752 words) - 17:31, 16 November 2024