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  2. Paternity Index - Wikipedia

    en.wikipedia.org/wiki/Paternity_Index

    Example calculation of a paternity index. In paternity testing, Paternity Index (PI) is a calculated value generated for a single genetic marker or locus (chromosomal location or site of DNA sequence of interest) and is associated with the statistical strength or weight of that locus in favor of or against parentage given the phenotypes of the tested participants and the inheritance scenario.

  3. Chronology of computation of π - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_computation...

    1 TB SATA II (Boot drive) – Hitachi (HDS721010CLA332), 5× 2 TB SATA II (Store Pi Output), 24× 2 TB SATA II (Computation) Windows Server 2008 R2 Enterprise (x64) Verification: 1.86 days (Bellard formula) and 4.94 days (BBP formula) 371 days 10,000,000,000,050 = 10 13 + 50 28 December 2013 Shigeru Kondo [53] using y-cruncher 0.6.3

  4. Bailey–Borwein–Plouffe formula - Wikipedia

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

    BBP and BBP-inspired algorithms have been used in projects such as PiHex [5] for calculating many digits of π using distributed computing. The existence of this formula came as a surprise. It had been widely believed that computing the nth digit of π is just as hard as computing the first n digits. [1] Since its discovery, formulas of the ...

  5. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.

  6. Chudnovsky algorithm - Wikipedia

    en.wikipedia.org/wiki/Chudnovsky_algorithm

    The Chudnovsky algorithm is a fast method for calculating the digits of π, based on Ramanujan's π formulae.Published by the Chudnovsky brothers in 1988, [1] it was used to calculate π to a billion decimal places.

  7. A Google employee broke the world record for calculating pi - AOL

    www.aol.com/article/finance/2019/03/14/a-google...

    Google engineer Emma Haruka Iwao has calculated pi to 31 trillion digits, breaking the world record.

  8. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    The mean pregnancy length has been estimated to be 283.4 days of gestational age as timed from the first day of the last menstrual period and 280.6 days when retrospectively estimated by obstetric ultrasound measurement of the fetal biparietal diameter (BPD) in the second trimester. [12]

  9. What’s the Profitability Index (PI) and How Is It Calculated?

    www.aol.com/finance/profitability-index-pi...

    As an example, if you’re considering a project that requires an initial investment of $100,000 and is expected to generate future cash flows with a present value of $120,000, the PI would be 1.2 ...

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