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  2. Clairaut's relation (differential geometry) - Wikipedia

    en.wikipedia.org/wiki/Clairaut's_relation...

    — Andrew Pressley: Elementary Differential Geometry, p. 183 Pressley (p. 185) explains this theorem as an expression of conservation of angular momentum about the axis of revolution when a particle moves along a geodesic under no forces other than those that keep it on the surface.

  3. Dirk Jan Struik - Wikipedia

    en.wikipedia.org/wiki/Dirk_Jan_Struik

    In 1950 Struik published his Lectures on Classical Differential Geometry, [13] which gained praise from Ian R. Porteous: Of all the textbooks on elementary differential geometry published in the last fifty years the most readable is one of the earliest, namely that by D.J. Struik (1950). He is the only one to mention Allvar Gullstrand. [14]

  4. Geometric transformation - Wikipedia

    en.wikipedia.org/wiki/Geometric_transformation

    Geometry and the Imagination (2nd ed.). Chelsea. ISBN 0-8284-1087-9. John McCleary (2013) Geometry from a Differentiable Viewpoint, Cambridge University Press ISBN 978-0-521-11607-7; Modenov, P. S.; Parkhomenko, A. S. (1965) . Geometric Transformations (2 vols.): Euclidean and Affine Transformations, and Projective Transformations. New York ...

  5. Differential geometry of surfaces - Wikipedia

    en.wikipedia.org/wiki/Differential_geometry_of...

    A major theorem, often called the fundamental theorem of the differential geometry of surfaces, asserts that whenever two objects satisfy the Gauss-Codazzi constraints, they will arise as the first and second fundamental forms of a regular surface. Using the first fundamental form, it is possible to define new objects on a regular surface.

  6. 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 ...

  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. Differential Galois theory - Wikipedia

    en.wikipedia.org/wiki/Differential_Galois_theory

    and a differential extension satisfies ∃s∈F; Dt = s. A differential extension or exponential extension becomes a Picard-Vessiot extension when the field has characteristic zero and the constant fields of the extended fields match. Keeping the above caveat in mind, this element can be regarded as the exponential of an element s in F.

  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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