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  2. APL syntax and symbols - Wikipedia

    en.wikipedia.org/wiki/APL_syntax_and_symbols

    APL uses the term operator in Heaviside’s sense as a moderator of a function as opposed to some other programming language's use of the same term as something that operates on data, ref. relational operator and operators generally.

  3. Repeating decimal - Wikipedia

    en.wikipedia.org/wiki/Repeating_decimal

    The period of ⁠ c / k ⁠, for c coprime to k, equals the period of ⁠ 1 / k ⁠. If k = 2 a ·5 b n where n > 1 and n is not divisible by 2 or 5, then the length of the transient of ⁠ 1 / k ⁠ is max(a, b), and the period equals r, where r is the multiplicative order of 10 mod n, that is the smallest integer such that 10 r ≡ 1 (mod n).

  4. List of power stations in England - Wikipedia

    en.wikipedia.org/wiki/List_of_power_stations_in...

    c. 1970 yes also hydro station Newcastle-under-Lyme [8] Newcastle-under-Lyme Staffordshire West Midlands 53°00'27.0"N 2°13'35.3"W Diesel engines 0.65 1921 c. 1955 Newman Spinney: Chesterfield Derbyshire East Midlands Gas from underground gasification 3.75 1958 1959 Yes National Coal Board abandoned gasification project Newton Abbot [11 ...

  5. List of aviation, avionics, aerospace and aeronautical ...

    en.wikipedia.org/wiki/List_of_aviation,_avionics...

    the Q-code for: Atmospheric pressure at aerodrome elevation (or at runway threshold) QNE: the Q-code for pressure altitude: QNH: the Q-code for: Altimeter sub-scale setting to obtain elevation when on the ground, i.e. altitude above MSL: QRA quick reaction alert: QRH quick reference handbook: QTOL: quiet take-off and landing [19]

  6. List of gravitational wave observations - Wikipedia

    en.wikipedia.org/wiki/List_of_gravitational_wave...

    Download QR code; Print/export Download as PDF; Printable version ... AT 2017gfo); nearest event to date [16] [30] [31] GW170818 02:25:09 2018-11-30 39; towards ...

  7. Confusion matrix - Wikipedia

    en.wikipedia.org/wiki/Confusion_matrix

    In predictive analytics, a table of confusion (sometimes also called a confusion matrix) is a table with two rows and two columns that reports the number of true positives, false negatives, false positives, and true negatives. This allows more detailed analysis than simply observing the proportion of correct classifications (accuracy).

  8. Octal - Wikipedia

    en.wikipedia.org/wiki/Octal

    To convert integer decimals to octal, prefix the number with "0.". Perform the following steps for as long as digits remain on the right side of the radix: Double the value to the left side of the radix, using octal rules, move the radix point one digit rightward, and then place the doubled value underneath the current value so that the radix ...

  9. Taylor's law - Wikipedia

    en.wikipedia.org/wiki/Taylor's_law

    where D 2 is the degree of precision desired, z α/2 is the upper α/2 of the normal distribution, a and b are the Taylor's law coefficients, c and d are the Nachman coefficients, n is the sample size and N is the number of infested units.