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  2. Bernoulli number - Wikipedia

    en.wikipedia.org/wiki/Bernoulli_number

    The Bernoulli numbers can be expressed in terms of the Riemann zeta function as B n = −nζ(1 − n) for integers n ≥ 0 provided for n = 0 the expression −nζ(1 − n) is understood as the limiting value and the convention B 1 = ⁠ 1 / 2 ⁠ is used. This intimately relates them to the values of the zeta function at negative integers.

  3. Orders of magnitude (numbers) - Wikipedia

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

    1/52! chance of a specific shuffle Mathematics: The chances of shuffling a standard 52-card deck in any specific order is around 1.24 × 10 −68 (or exactly 1 ⁄ 52!) [4] Computing: The number 1.4 × 10 −45 is approximately equal to the smallest positive non-zero value that can be represented by a single-precision IEEE floating-point value.

  4. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    In the United Kingdom, proof is 1.75 times the number (expressed as a percentage). [ 23 ] [ 20 ] For example, 40% alc/vol is 80 proof in the US and 70 proof in the UK. However, since 1980, alcohol proof in the UK has been replaced by alc/vol as a measure of alcohol content, avoiding confusion between the UK and US proof standards.

  5. Jewish population by country - Wikipedia

    en.wikipedia.org/wiki/Jewish_population_by_country

    [11] [12] Through the first five phases of Aliyah, the Jewish population rose to 630,000 by the rebirth of Israel in 1948. By 2014 this had risen to 6,135,000, [ 13 ] while the population of the diaspora has dropped from 10.5 to 8.1 million over the same period. [ 14 ]

  6. Principal component analysis - Wikipedia

    en.wikipedia.org/wiki/Principal_component_analysis

    PCA of a multivariate Gaussian distribution centered at (1,3) with a standard deviation of 3 in roughly the (0.866, 0.5) direction and of 1 in the orthogonal direction. . The vectors shown are the eigenvectors of the covariance matrix scaled by the square root of the corresponding eigenvalue, and shifted so their tails are at the m

  7. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    So think of the next number after 14 that ends with 1, which is 21. After coming to the top of this column, start with the bottom of the next column, and travel in the same direction. The number is 8. So think of the next number after 21 that ends with 8, which is 28. Proceed in the same way until the last number, 3, corresponding to 63.

  8. Matrix (mathematics) - Wikipedia

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

    Then the behavior of the electronic component can be described by B = H · A, where H is a 2 x 2 matrix containing one impedance element (h 12), one admittance element (h 21), and two dimensionless elements (h 11 and h 22). Calculating a circuit now reduces to multiplying matrices.

  9. Hexadecimal - Wikipedia

    en.wikipedia.org/wiki/Hexadecimal

    Hexadecimal (also known as base-16 or simply hex) is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 and "A"–"F" to represent values from ten to fifteen.