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  2. Quadratic reciprocity - Wikipedia

    en.wikipedia.org/wiki/Quadratic_reciprocity

    Quadratic Reciprocity (Legendre's statement). If p or q are congruent to 1 modulo 4, then: is solvable if and only if is solvable. If p and q are congruent to 3 modulo 4, then: is solvable if and only if is not solvable. The last is immediately equivalent to the modern form stated in the introduction above.

  3. Method of successive substitution - Wikipedia

    en.wikipedia.org/wiki/Method_of_successive...

    4j ≡ 2 (mod 6) We simplify by dividing by the greatest common divisor of 4,2 and 6. Division by 2 yields: 2j ≡ 1 (mod 3) The Euclidean modular multiplicative inverse of 2 mod 3 is 2. After multiplying both sides with the inverse, we obtain: j ≡ 2 × 1 (mod 3) or j ≡ 2 (mod 3) For the above to be true: j = 2 + 3k for some integer k.

  4. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12. In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his book Disquisitiones ...

  5. Video game modding - Wikipedia

    en.wikipedia.org/wiki/Video_game_modding

    t. e. Video game modding (short for "modification") is the process of alteration by players or fans of one or more aspects of a video game, [ 1] such as how it looks or behaves, and is a sub-discipline of general modding. Mods may range from small changes and tweaks to complete overhauls, and can extend the replay value and interest of the game.

  6. 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 same remainder when divided by n.

  7. Minecraft modding - Wikipedia

    en.wikipedia.org/wiki/Minecraft_modding

    Minecraft. modding. A Minecraft mod is a mod that changes aspects of the sandbox game Minecraft. Minecraft mods can add additional content to the game, make tweaks to specific features, and optimize performance. Thousands of mods for the game have been created, with some mods even generating an income for their authors.

  8. Autism Diagnostic Observation Schedule - Wikipedia

    en.wikipedia.org/wiki/Autism_Diagnostic...

    The Autism Diagnostic Observation Schedule ( ADOS) is a standardized diagnostic test for assessing autism spectrum disorder. The protocol consists of a series of structured and semi-structured tasks that involve social interaction between the examiner and the person under assessment. The examiner observes and identifies aspects of the subject's ...

  9. Brutal Doom - Wikipedia

    en.wikipedia.org/wiki/Brutal_Doom

    Brutal Doom is a video game mod for the 1993 first-person shooter Doom created by the Brazilian developer Marcos Abenante, known online as "Sergeant Mark IV." It adds numerous gameplay elements and graphical effects. The mod has been in development since 2010, and continues to receive new updates. [ 1][ 2]