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  2. Integer - Wikipedia

    en.wikipedia.org/wiki/Integer

    The integers arranged on a number line. An integer is the number zero , a positive natural number (1, 2, 3, . . .), or the negation of a positive natural number (−1, −2, −3, . . .). [1] The negations or additive inverses of the positive natural numbers are referred to as negative integers. [2]

  3. Eisenstein integer - Wikipedia

    en.wikipedia.org/wiki/Eisenstein_integer

    The Eisenstein integers form a commutative ring of algebraic integers in the algebraic number field Q(ω) – the third cyclotomic field.To see that the Eisenstein integers are algebraic integers note that each z = a + bω is a root of the monic polynomial

  4. Natural number - Wikipedia

    en.wikipedia.org/wiki/Natural_number

    Download as PDF; Printable version; In other projects ... defining the natural numbers as the non-negative integers 0, 1 ... He initially defined a natural number as ...

  5. Geometry of numbers - Wikipedia

    en.wikipedia.org/wiki/Geometry_of_numbers

    In the geometry of numbers, the subspace theorem was obtained by Wolfgang M. Schmidt in 1972. [6] It states that if n is a positive integer, and L 1,...,L n are linearly independent linear forms in n variables with algebraic coefficients and if ε>0 is any given real number, then the non-zero integer points x in n coordinates with

  6. Number theory - Wikipedia

    en.wikipedia.org/wiki/Number_theory

    Number theory is a branch of pure mathematics devoted primarily to the study of the integers and arithmetic functions.German mathematician Carl Friedrich Gauss (1777–1855) said, "Mathematics is the queen of the sciences—and number theory is the queen of mathematics."

  7. Elementary algebra - Wikipedia

    en.wikipedia.org/wiki/Elementary_algebra

    If x and y are integers, rationals, or real numbers, then xy = 0 implies x = 0 or y = 0. Consider abc = 0. Then, substituting a for x and bc for y, we learn a = 0 or bc = 0. Then we can substitute again, letting x = b and y = c, to show that if bc = 0 then b = 0 or c = 0. Therefore, if abc = 0, then a = 0 or (b = 0 or c = 0), so abc = 0 implies ...

  8. Superior highly composite number - Wikipedia

    en.wikipedia.org/wiki/Superior_highly_composite...

    Divisor function d(n) up to n = 250 Prime-power factors. In number theory, a superior highly composite number is a natural number which, in a particular rigorous sense, has many divisors.

  9. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    By analogy with the factorial function, a product whose factors are the integers from 1 to n, Donald Knuth proposed the name Termial function, [18] with the notation n? for the sum whose terms are the integers from a to n (the n th triangular number).