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  2. Comparison of download managers - Wikipedia

    en.wikipedia.org/.../Comparison_of_download_managers

    Manager Platform Latest release License Cost CLI GUI Notes Version Date BitComet: macOS 2.10 [1] 2024-10-09 Proprietary: No cost: Partial [2] Yes [a] Windows 2.10 [1] 2024-10-09 Download Accelerator Plus macOS 10.0.6.0 [3] 2014-07-21 Proprietary: Depends ? Yes Windows DownloadStudio: Windows 10.0.4.0 [4] 2017-12-21 Proprietary: At cost [b] Yes ...

  3. Free Download Manager - Wikipedia

    en.wikipedia.org/wiki/Free_Download_Manager

    Free Download Manager is a download manager for Windows, macOS, Linux and Android. [ 4 ] [ 5 ] Free Download Manager is proprietary software , but was free and open-source software between versions 2.5 [ 6 ] and 3.9.7.

  4. Frenet–Serret formulas - Wikipedia

    en.wikipedia.org/wiki/Frenet–Serret_formulas

    The first Frenet-Serret formula holds by the definition of the normal N and the curvature κ, and the third Frenet-Serret formula holds by the definition of the torsion τ. Thus what is needed is to show the second Frenet-Serret formula. Since T, N, B are orthogonal unit vectors with B = T × N, one also has T = N × B and N = B × T.

  5. Kappa curve - Wikipedia

    en.wikipedia.org/wiki/Kappa_curve

    The kappa curve has two vertical asymptotes. In geometry, the kappa curve or Gutschoven's curve is a two-dimensional algebraic curve resembling the Greek letter ϰ (kappa).The kappa curve was first studied by Gérard van Gutschoven around 1662.

  6. Metric tensor (general relativity) - Wikipedia

    en.wikipedia.org/wiki/Metric_tensor_(general...

    The metric captures all the geometric and causal structure of spacetime, being used to define notions such as time, distance, volume, curvature, angle, and separation of the future and the past. In general relativity, the metric tensor plays the role of the gravitational potential in the classical theory of gravitation, although the physical ...

  7. Kappa calculus - Wikipedia

    en.wikipedia.org/wiki/Kappa_calculus

    In mathematical logic, category theory, and computer science, kappa calculus is a formal system for defining first-order functions. Unlike lambda calculus, kappa calculus has no higher-order functions; its functions are not first class objects. Kappa-calculus can be regarded as "a reformulation of the first-order fragment of typed lambda ...

  8. Torsion of a curve - Wikipedia

    en.wikipedia.org/wiki/Torsion_of_a_curve

    A plane curve with non-vanishing curvature has zero torsion at all points. Conversely, if the torsion of a regular curve with non-vanishing curvature is identically zero, then this curve belongs to a fixed plane. The curvature and the torsion of a helix are constant. Conversely, any space curve whose curvature and torsion are both constant and ...

  9. Einstein tensor - Wikipedia

    en.wikipedia.org/wiki/Einstein_tensor

    The Einstein tensor is a tensor of order 2 defined over pseudo-Riemannian manifolds.In index-free notation it is defined as =, where is the Ricci tensor, is the metric tensor and is the scalar curvature, which is computed as the trace of the Ricci tensor by ⁠ = ⁠.