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  2. Simple continued fraction - Wikipedia

    en.wikipedia.org/wiki/Simple_continued_fraction

    If x is rational, it will have two continued fraction representations that are finite, x 1 and x 2, and similarly a rational y will have two representations, y 1 and y 2. The coefficients beyond the last in any of these representations should be interpreted as +∞; and the best rational will be one of z(x 1, y 1), z(x 1, y 2), z(x 2, y 1), or ...

  3. Ratio - Wikipedia

    en.wikipedia.org/wiki/Ratio

    The ratio of numbers A and B can be expressed as: [6]. the ratio of A to B; A:B; A is to B (when followed by "as C is to D "; see below); a fraction with A as numerator and B as denominator that represents the quotient (i.e., A divided by B, or).

  4. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    The entire fraction may be expressed as a single composition, in which case it is hyphenated, or as a number of fractions with a numerator of one, in which case they are not. (For example, two-fifths is the fraction2 / 5 ⁠ and two fifths is the same fraction understood as 2 instances of ⁠ 1 / 5 ⁠.) Fractions should always be ...

  5. Dyadic rational - Wikipedia

    en.wikipedia.org/wiki/Dyadic_rational

    In mathematics, a dyadic rational or binary rational is a number that can be expressed as a fraction whose denominator is a power of two. For example, 1/2, 3/2, and 3/8 are dyadic rationals, but 1/3 is not. These numbers are important in computer science because they are the only ones with finite binary representations. Dyadic rationals also ...

  6. Euler's totient function - Wikipedia

    en.wikipedia.org/wiki/Euler's_totient_function

    These twenty fractions are all the positive ⁠ k / d ⁠ ≤ 1 whose denominators are the divisors d = 1, 2, 4, 5, 10, 20. The fractions with 20 as denominator are those with numerators relatively prime to 20, namely ⁠ 1 / 20 ⁠ , ⁠ 3 / 20 ⁠ , ⁠ 7 / 20 ⁠ , ⁠ 9 / 20 ⁠ , ⁠ 11 / 20 ⁠ , ⁠ 13 / 20 ⁠ , ⁠ 17 / 20 ⁠ , ⁠ 19 ...

  7. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    [2] [3] Historically, the concept of a proof and its associated mathematical rigour first appeared in Greek mathematics , most notably in Euclid 's Elements . [ 4 ] Since its beginning, mathematics was primarily divided into geometry and arithmetic (the manipulation of natural numbers and fractions ), until the 16th and 17th centuries, when ...

  8. Carl Friedrich Gauss - Wikipedia

    en.wikipedia.org/wiki/Carl_Friedrich_Gauss

    This is an accepted version of this page This is the latest accepted revision, reviewed on 14 February 2025. German mathematician, astronomer, geodesist, and physicist (1777–1855) "Gauss" redirects here. For other uses, see Gauss (disambiguation). Carl Friedrich Gauss Portrait by Christian Albrecht Jensen, 1840 (copy from Gottlieb Biermann, 1887) Born Johann Carl Friedrich Gauss (1777-04-30 ...

  9. Energy density - Wikipedia

    en.wikipedia.org/wiki/Energy_density

    If the produced H 2 O is vapor, this is generally greater than the lower heat of combustion, whereas if the produced H 2 O is liquid, it is generally less than the higher heat of combustion. But in the most relevant case of hydrogen, Δ G is 113 MJ/kg if water vapor is produced, and 118 MJ/kg if liquid water is produced, both being less than ...