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  2. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.The number π appears in many formulae across mathematics and physics.

  3. Chronology of computation of π - Wikipedia

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

    The table below is a brief chronology of computed numerical values of, or bounds on, the mathematical constant pi (π).For more detailed explanations for some of these calculations, see Approximations of π.

  4. Leibniz formula for π - Wikipedia

    en.wikipedia.org/wiki/Leibniz_formula_for_π

    In mathematics, the Leibniz formula for π, named after Gottfried Wilhelm Leibniz, states that = + + = = +,. an alternating series.. It is sometimes called the Madhava–Leibniz series as it was first discovered by the Indian mathematician Madhava of Sangamagrama or his followers in the 14th–15th century (see Madhava series), [1] and was later independently rediscovered by James Gregory in ...

  5. Milü - Wikipedia

    en.wikipedia.org/wiki/Milü

    Milü (Chinese: 密率; pinyin: mìlǜ; "close ratio"), also known as Zulü (Zu's ratio), is the name given to an approximation to π (pi) found by Chinese mathematician and astronomer Zu Chongzhi in the 5th century.

  6. Pi Day - Wikipedia

    en.wikipedia.org/wiki/Pi_Day

    Pi Day is an annual celebration of the mathematical constant π (pi) observed on March 14th.

  7. Physical quantity - Wikipedia

    en.wikipedia.org/wiki/Physical_quantity

    Ampèremetre ()A physical quantity (or simply quantity) [1] [a] is a property of a material or system that can be quantified by measurement.A physical quantity can be expressed as a value, which is the algebraic multiplication of a numerical value and a unit of measurement.

  8. Talk:3.14159265 - Wikipedia

    en.wikipedia.org/wiki/Talk:3.14159265

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  9. Shanks transformation - Wikipedia

    en.wikipedia.org/wiki/Shanks_transformation

    For a sequence {} the series = = is to be determined. First, the partial sum is defined as: = = and forms a new sequence {}.Provided the series converges, will also approach the limit as .