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  2. Generating function - Wikipedia

    en.wikipedia.org/wiki/Generating_function

    In mathematics, a generating function is a representation of an infinite sequence of numbers as the coefficients of a formal power series.Generating functions are often expressed in closed form (rather than as a series), by some expression involving operations on the formal series.

  3. List of magical weapons - Wikipedia

    en.wikipedia.org/wiki/List_of_magical_weapons

    The Sword of Triton - Blackbeard's sword, later wielded by Hector Barbossa with magical properties that first appears in the 2011 film Pirates of the Caribbean: On Stranger Tides. According to the film's visual guide, the Sword of Triton was forged in the lost city of Atlantis as well as commands and channels unearthly and mystical power that ...

  4. List of mythological objects - Wikipedia

    en.wikipedia.org/wiki/List_of_mythological_objects

    This sword is used by Llenlleawg Wyddel to kill Diwrnach Wyddel and his men. Ceard-nan Gallan, the Smith of the Branches, sword of Oisín. Claíomh Solais (Sword of Light), the sword of Nuada Airgeadlámh. The sword glowed with the light of the sun and was irresistible in battle, having the power to cut his enemies in half.

  5. CJ-10 (missile) - Wikipedia

    en.wikipedia.org/wiki/CJ-10_(missile)

    [10] [11] Publications may use both terms interchangeably. [1] [12] The Center for Strategic and International Studies believes that the CJ-10 is a member of the Hongniao (HN) series of missiles; [13] Ian Easton believes that the CJ-10 is the same missile as the HN-2, and that the HN-3 is the "DH-10A". [14]

  6. Bell number - Wikipedia

    en.wikipedia.org/wiki/Bell_number

    The next Bell prime is B 2841, which is approximately 9.30740105 × 10 6538. [25] History

  7. Electric bell - Wikipedia

    en.wikipedia.org/wiki/Electric_bell

    The most widely used form is the interrupter bell, which is a mechanical bell that produces a continuous sound when current is applied. See animation, above. The bell or gong (B), which is often in the shape of a cup or half-sphere, is struck by a spring-loaded arm (A) with a metal ball on the end called a clapper, actuated by an electromagnet ...

  8. Change ringing - Wikipedia

    en.wikipedia.org/wiki/Change_ringing

    A bell that is up is dangerous to be near, and only expert ringers should ever contemplate entering a bell chamber or touching a rope when the bells are up. To raise a bell, the ringer pulls on the rope and starts the bell swinging. Each time the bell swings the ringer adds a little more energy to the system, similar to pushing a child's swing.

  9. Bell metal - Wikipedia

    en.wikipedia.org/wiki/Bell_metal

    Cannon made of bell metal at Malik-e-Maidan, Bijapur, India. Bell metal or bell bronze is an alloy used for making bells and related instruments, such as cymbals.It is a form of bronze with a higher tin content than most other bronzes, usually in approximately a 4:1 ratio of copper to tin (typically, 78% copper, 22% tin by mass).