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  2. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    Time-keeping on this clock uses arithmetic modulo 12. 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.

  3. Module (mathematics) - Wikipedia

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

    A right R-module M R is defined similarly in terms of an operation · : M × R → M. Authors who do not require rings to be unital omit condition 4 in the definition above; they would call the structures defined above "unital left R-modules". In this article, consistent with the glossary of ring theory, all rings and modules are assumed to be ...

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Mathematics is a field of study that discovers and organizes methods, ... [17] Many easily stated number problems have solutions that require sophisticated methods ...

  5. Principia Mathematica - Wikipedia

    en.wikipedia.org/wiki/Principia_Mathematica

    Sections 10, 11, 12: Properties of a variable extended to all individuals: section 10 introduces the notion of "a property" of a "variable". PM gives the example: φ is a function that indicates "is a Greek", and ψ indicates "is a man", and χ indicates "is a mortal" these functions then apply to a variable x .

  6. RTX (RTX) Q4 2024 Earnings Call Transcript - AOL

    www.aol.com/finance/rtx-rtx-q4-2024-earnings...

    So you just do the math there, operationally, about $8.4 billion. Now there's a $1.3 billion working capital tailwind baked into that year-over-year improvement.

  7. Resolution (algebra) - Wikipedia

    en.wikipedia.org/wiki/Resolution_(algebra)

    In mathematics, and more specifically in homological algebra, a resolution (or left resolution; dually a coresolution or right resolution [1]) is an exact sequence of modules (or, more generally, of objects of an abelian category) that is used to define invariants characterizing the structure of a specific module or object of this category.

  8. Algebra - Wikipedia

    en.wikipedia.org/wiki/Algebra

    Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.

  9. American Mathematics Competitions - Wikipedia

    en.wikipedia.org/wiki/American_Mathematics...

    the AMC 10, for students under the age of 17.5 and in grades 10 and below; the AMC 12, for students under the age of 19.5 and in grades 12 and below [2] The AMC 8 tests mathematics through the 8th grade curriculum. [1] Similarly, the AMC 10 and AMC 12 test mathematics through the 10th and 12th grade curriculum, respectively. [2]