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  2. Bailey–Borwein–Plouffe formula - Wikipedia

    en.wikipedia.org/wiki/Bailey–Borwein–Plouffe...

    Using the P function mentioned above, the simplest known formula for π is for s = 1, but m > 1. Many now-discovered formulae are known for b as an exponent of 2 or 3 and m as an exponent of 2 or it some other factor-rich value, but where several of the terms of sequence A are zero. The discovery of these formulae involves a computer search for ...

  3. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr or 3 σ, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean ...

  4. Symmetric probability distribution - Wikipedia

    en.wikipedia.org/wiki/Symmetric_probability...

    The degree of symmetry, in the sense of mirror symmetry, can be evaluated quantitatively for multivariate distributions with the chiral index, which takes values in the interval [0;1], and which is null if and only if the distribution is mirror symmetric. [1]

  5. Differential entropy - Wikipedia

    en.wikipedia.org/wiki/Differential_entropy

    In terms of measure theory, the differential entropy of a probability measure is the negative relative entropy from that measure to the Lebesgue measure, where the latter is treated as if it were a probability measure, despite being unnormalized.

  6. LSZ reduction formula - Wikipedia

    en.wikipedia.org/wiki/LSZ_reduction_formula

    That is, its expectation value between the vacuum and a many-particle state is null. On the other hand, the interacting field can also connect many-particle states to the vacuum, thanks to interaction, so the expectation values on the two sides of the last equation are different, and need a normalization factor in between.

  7. Intrabeam scattering - Wikipedia

    en.wikipedia.org/wiki/Intrabeam_Scattering

    These approximations are summarized in Intrabeam scattering formulas for high energy beams by K. Kubo et al. [3] Intrabeam scattering rates have a 1 / γ 4 {\displaystyle 1/\gamma ^{4}} dependence. This means that its effects diminish with increasing beam energy.

  8. Alpha Omega (fraternity) - Wikipedia

    en.wikipedia.org/wiki/Alpha_Omega_(fraternity)

    There is a blue sapphire at the top of the diamond and a white sapphire at the bottom. [6] The rest of the border is outlined in ten pearls. [6] The fraternity also has a pledge pin that is a diamond with black enamel on the top half and gold enamel on the bottom half. [6] The fraternity's colors are black and gold. [6] Its flower is the ...