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  2. Descent (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Descent_(mathematics)

    In mathematics, the idea of descent extends the intuitive idea of 'gluing' in topology. Since the topologists' glue is the use of equivalence relations on topological spaces , the theory starts with some ideas on identification.

  3. Gradient descent - Wikipedia

    en.wikipedia.org/wiki/Gradient_descent

    Gradient descent is a method for unconstrained mathematical optimization. It is a first-order iterative algorithm for minimizing a differentiable multivariate function . The idea is to take repeated steps in the opposite direction of the gradient (or approximate gradient) of the function at the current point, because this is the direction of ...

  4. Descent - Wikipedia

    en.wikipedia.org/wiki/Descent

    Infinite descent, a method going back to Fermat to solve Diophantine equations; Descent (mathematics), an idea extending the notion of "gluing" in topology Hadamard's method of descent, a technique for solving partial differential equations

  5. Harrowing of Hell - Wikipedia

    en.wikipedia.org/wiki/Harrowing_of_Hell

    In Christian theology, the Harrowing of Hell (Latin: Descensus Christi ad Inferos, "the descent of Christ into Hell" or Hades) [a] is the period of time between the Crucifixion of Jesus and his resurrection. In triumphant descent, Christ brought salvation to the souls held captive there since the beginning of the world. [1]

  6. Ancestor - Wikipedia

    en.wikipedia.org/wiki/Ancestor

    This is an accepted version of this page This is the latest accepted revision, reviewed on 25 January 2025. Person from whom another person is descended For other uses, see Ancestor (disambiguation). "Ancestry", "Forefather", and "Ancestress" redirect here. For the genealogy company, see Ancestry.com. For the band, see Forefather (band). For the song, see Ancestress (song). This article needs ...

  7. Descent (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Descent_(aeronautics)

    In aeronautics, a descent is any time period during air travel where an aircraft decreases altitude, and is the opposite of an ascent or climb.. Descents are part of normal procedures, but also occur during emergencies, such as rapid or explosive decompression, forcing an emergency descent to below 3,000 m (10,000 ft) and preferably below 2,400 m (8,000 ft), respectively the maximum temporary ...

  8. Ascending and descending (diving) - Wikipedia

    en.wikipedia.org/wiki/Ascending_and_descending...

    Descent rates are usually limited by equalisation issues, particularly with ears and sinuses, but on helmet dives can be limited by flow rate of gas available for equalising the helmet and suit, by carbon dioxide buildup caused by inadequate exhalation, and for divers breathing heliox at great depths, by high-pressure nervous syndrome. Ascents ...

  9. Davidic line - Wikipedia

    en.wikipedia.org/wiki/Davidic_line

    The Jewish banking family Louis Cahen d'Anvers claimed descent from the Davidic Line [42] Rabbi Yosef Dayan, who is a modern-day claimant to the Davidic throne in Israel and the founder of the Monarchist party Malchut Israel, descends from the Dayan family of Aleppo, who paternally descend from Hasan ben Zakkai, the younger brother of the ...