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  2. Lowest common denominator - Wikipedia

    en.wikipedia.org/wiki/Lowest_common_denominator

    Description. The lowest common denominator of a set of fractions is the lowest number that is a multiple of all the denominators: their lowest common multiple. The product of the denominators is always a common denominator, as in: but it is not always the lowest common denominator, as in: Here, 36 is the least common multiple of 12 and 18.

  3. Least common multiple - Wikipedia

    en.wikipedia.org/wiki/Least_common_multiple

    The least common multiple of the denominators of two fractions is the "lowest common denominator" (lcd), and can be used for adding, subtracting or comparing the fractions. The least common multiple of more than two integers a , b , c , . . . , usually denoted by lcm( a , b , c , . . .) , is defined as the smallest positive integer that is ...

  4. Landau's function - Wikipedia

    en.wikipedia.org/wiki/Landau's_function

    Landau's function. In mathematics, Landau's function g (n), named after Edmund Landau, is defined for every natural number n to be the largest order of an element of the symmetric group Sn. Equivalently, g (n) is the largest least common multiple (lcm) of any partition of n, or the maximum number of times a permutation of n elements can be ...

  5. Orders of magnitude (numbers) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(numbers)

    Mathematics: 2,520 (5×7×8×9 or 2 3 ×3 2 ×5×7) is the least common multiple of every positive integer under (and including) 10. Terrorism: 2,996 persons (including 19 terrorists) died in the terrorist attacks of September 11, 2001. Biology: the DNA of the simplest viruses has 3,000 base pairs. [9]

  6. 2520 (number) - Wikipedia

    en.wikipedia.org/wiki/2520_(number)

    In mathematics. 2520 is: the smallest number divisible by all integers from one to ten, i.e., it is their least common multiple. a superior highly composite number. a colossally abundant number. the last highly composite number that is half of the next highly composite number. [1]

  7. Carmichael function - Wikipedia

    en.wikipedia.org/wiki/Carmichael_function

    In number theory, a branch of mathematics, the Carmichael function λ(n) of a positive integer n is the smallest positive integer m such that. holds for every integer a coprime to n. In algebraic terms, λ(n) is the exponent of the multiplicative group of integers modulo n. As this is a finite abelian group, there must exist an element whose ...

  8. Coprime integers - Wikipedia

    en.wikipedia.org/wiki/Coprime_integers

    Coprime integers. In number theory, two integers a and b are coprime, relatively prime or mutually prime if the only positive integer that is a divisor of both of them is 1. [1] Consequently, any prime number that divides a does not divide b, and vice versa. This is equivalent to their greatest common divisor (GCD) being 1. [2]

  9. Greatest common divisor - Wikipedia

    en.wikipedia.org/wiki/Greatest_common_divisor

    In mathematics, the greatest common divisor (GCD), also known as greatest common factor (GCF), of two or more integers, which are not all zero, is the largest positive integer that divides each of the integers. For two integers x, y, the greatest common divisor of x and y is denoted . For example, the GCD of 8 and 12 is 4, that is, gcd (8, 12 ...