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  2. Modulo (mathematics) - Wikipedia

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

    Modulo is a mathematical jargon that was introduced into mathematics in the book Disquisitiones Arithmeticae by Carl Friedrich Gauss in 1801. [3] Given the integers a, b and n, the expression " a ≡ b (mod n )", pronounced " a is congruent to b modulo n ", means that a − b is an integer multiple of n, or equivalently, a and b both share the ...

  3. IEC 62196 - Wikipedia

    en.wikipedia.org/wiki/IEC_62196

    Contents[edit] IEC 62196-2 extends IEC 62196-1 and describes specific designs of plugs, socket-outlets, vehicle connectors and vehicle inlets that are intended to be used for AC charging of electric vehicles in the modes 1, 2 and 3 as described by IEC 61851-1. The specific designs are grouped into three configurations.

  4. Hydra 70 - Wikipedia

    en.wikipedia.org/wiki/Hydra_70

    The Hydra 70 is derived from the 2.75-inch (70 mm) diameter Mk 4/Mk 40 Folding-Fin Aerial Rocket developed by the United States Navy for use as a free-flight aerial rocket in the late 1940s. The Mk 40 was used during the Korean and Vietnam wars to provide close air support to ground forces from about 20 different firing platforms, both fixed ...

  5. Greedy algorithm for Egyptian fractions - Wikipedia

    en.wikipedia.org/wiki/Greedy_algorithm_for...

    The Erdős–Straus conjecture states that all fractions 4 / y have an expansion with three or fewer terms, but when y ≡ 1 or 17 (mod 24) such expansions must be found by methods other than the greedy algorithm, with the 17 (mod 24) case being covered by the congruence relationship 2 (mod 3).

  6. Knowledge production modes - Wikipedia

    en.wikipedia.org/wiki/Knowledge_production_modes

    Knowledge production modes. A knowledge production mode is a term from the sociology of science which refers to the way (scientific) knowledge is produced. So far, three modes have been conceptualized. Mode 1 production of knowledge is knowledge production motivated by scientific knowledge alone ( basic research) which is not primarily ...

  7. 5-inch/54-caliber Mark 45 gun - Wikipedia

    en.wikipedia.org/wiki/5-inch/54-caliber_Mark_45_gun

    Mod 2. Export version of Mod 1, but now used in the U.S. Navy Mod 3. Mod 2 gun with a new control system; never put into production Mod 4. Receives a longer 62-caliber barrel (versus Mod 1 and 2's 54 caliber) for more complete propellant combustion and higher velocity and thus more utility for

  8. Fermat's theorem on sums of two squares - Wikipedia

    en.wikipedia.org/wiki/Fermat's_theorem_on_sums_of...

    On the other hand, the primes 3, 7, 11, 19, 23 and 31 are all congruent to 3 modulo 4, and none of them can be expressed as the sum of two squares. This is the easier part of the theorem, and follows immediately from the observation that all squares are congruent to 0 (if number squared is even) or 1 (if number squared is odd) modulo 4.

  9. Euler's criterion - Wikipedia

    en.wikipedia.org/wiki/Euler's_criterion

    In number theory, Euler's criterion is a formula for determining whether an integer is a quadratic residue modulo a prime. Precisely, Let p be an odd prime and a be an integer coprime to p. Then [1] [2] [3] Euler's criterion can be concisely reformulated using the Legendre symbol: [4] The criterion dates from a 1748 paper by Leonhard Euler.

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