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  2. Natural logarithm - Wikipedia

    en.wikipedia.org/wiki/Natural_logarithm

    The natural logarithm of e itself, ln e, is 1, because e 1 = e, while the natural logarithm of 1 is 0, since e 0 = 1. The natural logarithm can be defined for any positive real number a as the area under the curve y = 1/x from 1 to a [4] (with the area being negative when 0 < a < 1). The simplicity of this definition, which is matched in many ...

  3. List of logarithmic identities - Wikipedia

    en.wikipedia.org/wiki/List_of_logarithmic_identities

    The natural logarithm is asymptotically related to the harmonic numbers by the Stirling numbers [17] and the Gregory coefficients. [18] By representing H n {\displaystyle H_{n}} in terms of Stirling numbers of the first kind , the harmonic number difference is alternatively expressed as follows, for fixed k {\displaystyle k} :

  4. Complex logarithm - Wikipedia

    en.wikipedia.org/wiki/Complex_logarithm

    A single branch of the complex logarithm. The hue of the color is used to show the argument of the complex logarithm. The brightness of the color is used to show the modulus of the complex logarithm. The real part of log(z) is the natural logarithm of | z |. Its graph is thus obtained by rotating the graph of ln(x) around the z-axis.

  5. Logarithm - Wikipedia

    en.wikipedia.org/wiki/Logarithm

    In mathematics, the logarithm of a number is the exponent by which another fixed value, the base, must be raised to produce that number.For example, the logarithm of 1000 to base 10 is 3, because 1000 is 10 to the 3 rd power: 1000 = 10 3 = 10 × 10 × 10.

  6. Gamma function - Wikipedia

    en.wikipedia.org/wiki/Gamma_function

    This article uses technical mathematical notation for logarithms. All instances of log( x ) without a subscript base should be interpreted as a natural logarithm , also commonly written as ln( x ) or log e ( x ) .

  7. Stirling's approximation - Wikipedia

    en.wikipedia.org/wiki/Stirling's_approximation

    Evaluating at = gives the usual ... De Moivre gave an approximate rational-number expression for the natural logarithm of the constant.

  8. Dogs don't actually age 7 times faster than humans, new study ...

    www.aol.com/lifestyle/dogs-dont-actually-age-7...

    16 x ln( the natural logarithm of your dog’s age in "human years") + 31. Confused? Here's an example. Say you have a 4-year-old Labrador named Comet — with the new equation, Comet's real "dog ...

  9. Log-normal distribution - Wikipedia

    en.wikipedia.org/wiki/Log-normal_distribution

    This relationship is determined by the base of natural logarithm, = …, and exhibits some geometrical similarity to the minimal surface energy principle. These scaling relations are useful for predicting a number of growth processes (epidemic spreading, droplet splashing, population growth, swirling rate of the bathtub vortex, distribution of ...