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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  3. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    D 50: Mass-median-diameter (MMD). The log-normal distribution mass median diameter. The MMD is considered to be the average particle diameter by mass. σ g: Geometric standard deviation. This value is determined mathematically by the equation: σ g = D 84.13 /D 50 = D 50 /D 15.87. The value of σ g determines the slope of the least-squares ...

  4. List of eponymous laws - Wikipedia

    en.wikipedia.org/wiki/List_of_eponymous_laws

    As the number of articles published increases, authors producing that many publications become less frequent. For example, there may be 1 ⁄ 4 as many authors publishing two articles within a specified time period as there are single-publication authors, 1 ⁄ 9 as many publishing three articles, 1 ⁄ 16 as many publishing four articles, etc ...

  5. Wikipedia : Manual of Style/Mathematics

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    Instead, formulas may be placed on their own line using < math display = block >. For instance, the formula above was typeset using <math display=block> \int _ 0 ^ \pi \sin x \, dx.</math>. If you find an article which indents lines with spaces in order to achieve some formula layout effect, you should convert the formula to LaTeX markup.

  6. Wikipedia:Manual of Style/Dates and numbers - Wikipedia

    en.wikipedia.org/.../Dates_and_numbers

    Numbers in mathematical formulae are never spelled out (3 < π < ⁠ 22 / 7 ⁠ not three < pi < twenty-two sevenths), and "numbers as numbers" are rarely spelled out in other mathematical contexts (the first three primes are 2, 3, and 5 not the first three primes are two, three, and five; but zero-sum game and roots of unity).

  7. Convolution of probability distributions - Wikipedia

    en.wikipedia.org/wiki/Convolution_of_probability...

    The probability distribution of the sum of two or more independent random variables is the convolution of their individual distributions. The term is motivated by the fact that the probability mass function or probability density function of a sum of independent random variables is the convolution of their corresponding probability mass functions or probability density functions respectively.

  8. Fisher's exact test - Wikipedia

    en.wikipedia.org/wiki/Fisher's_exact_test

    Genes that are provided in the second list and not the first; Genes that are not provided in either list; The test assumes genes in either list are taken from a broader set of genes (e.g. all remaining genes). A p-value may then be calculated, summarizing the significance of the overlap between the two lists. [12]

  9. Real number - Wikipedia

    en.wikipedia.org/wiki/Real_number

    This means that = for every nonzero real number a. The total order is denoted <. being that it is a total order means two properties: given two real numbers a and b, exactly one of <, = or < is true; and if < and <, then one has also <.