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  2. Numeric precision in Microsoft Excel - Wikipedia

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

    Here the 'IEEE 754 double value' resulting of the 15 bit figure is 3.330560653658221E-15, which is rounded by Excel for the 'user interface' to 15 digits 3.33056065365822E-15, and then displayed with 30 decimals digits gets one 'fake zero' added, thus the 'binary' and 'decimal' values in the sample are identical only in display, the values ...

  3. Counting efficiency - Wikipedia

    en.wikipedia.org/wiki/Counting_efficiency

    count of photons n with energy Q p = h c/λ. [nb 2] photon flux: Φ q: count per second: s −1: T −1: photons per unit time, dn/dt with n = photon number. also called photon power: photon intensity: I: count per steradian per second sr −1 ⋅s −1: T −1: dn/dω: photon radiance: L q: count per square metre per steradian per second m − ...

  4. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    The general problem of matching any number of backreferences is NP-complete, and the execution time for known algorithms grows exponentially by the number of backreference groups used. [ 45 ] However, many tools, libraries, and engines that provide such constructions still use the term regular expression for their patterns.

  5. Count - Wikipedia

    en.wikipedia.org/wiki/Count

    Count Carl Gustaf Mannerheim (1797–1854), the governor of the Vyborg Province, entomologist and the grandfather of Baron C. G. E. Mannerheim. Count (feminine: countess) is a historical title of nobility in certain European countries, varying in relative status, generally of middling rank in the hierarchy of nobility. [1]

  6. LibreOffice - Wikipedia

    en.wikipedia.org/wiki/LibreOffice

    In September 2013, after two years, the estimated number of LibreOffice users was 75 million. [199] A million new unique IP addresses check for downloads each week. [200] 2015 In 2015, LibreOffice was used by 100 million users and 18 governments. [201] 2016 In August 2016, the number of LibreOffice users was estimated at 120 million. [202] 2018