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  2. Allport's Scale - Wikipedia

    en.wikipedia.org/wiki/Allport's_scale

    Allport's Scale of Prejudice goes from 1 to 5. Antilocution: Antilocution occurs when an in-group freely purports negative images of an out-group. [2] Hate speech is the extreme form of this stage. [3] It is commonly seen as harmless by the majority.

  3. Resistor ladder - Wikipedia

    en.wikipedia.org/wiki/Resistor_ladder

    A 1953 paper "Coding by Feedback Methods" [1] describes "decoding networks" that convert numbers (in any base) represented by voltage sources or current sources connected to resistor networks in a "shunt resistor decoding network" (which in base 2 corresponds to the binary-weighted configuration) or in a "ladder resistor decoding network" (which in base 2 corresponds to R–2R configuration ...

  4. Rook polynomial - Wikipedia

    en.wikipedia.org/wiki/Rook_polynomial

    Iterating, it follows that R 4n = 2n(2n − 1)(2n − 3)...1. The number of arrangements for a (4 n + 1) × (4 n + 1) board is the same as that for a 4 n × 4 n board; this is because on a (4 n + 1) × (4 n + 1) board, one rook must necessarily stand in the centre and thus the central rank and file can be removed.

  5. Inverse Symbolic Calculator - Wikipedia

    en.wikipedia.org/wiki/Inverse_Symbolic_Calculator

    Hence, the calculator is of great importance for those working in numerical areas of experimental mathematics. The ISC contains 54 million mathematical constants. Plouffe's Inverter (opened in 1998) contains 214 million. A newer version of the tables with 3.702 billion entries (as of June 19, 2010) exists.

  6. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    The products of small numbers may be calculated by using the squares of integers; for example, to calculate 13 × 17, one can remark 15 is the mean of the two factors, and think of it as (15 − 2) × (15 + 2), i.e. 15 22 2.

  7. Runge–Kutta methods - Wikipedia

    en.wikipedia.org/wiki/Runge–Kutta_methods

    For example, a two-stage method has order 2 if b 1 + b 2 = 1, b 2 c 2 = 1/2, and b 2 a 21 = 1/2. [8] Note that a popular condition for determining coefficients is [ 8 ] ∑ j = 1 i − 1 a i j = c i for i = 2 , … , s . {\displaystyle \sum _{j=1}^{i-1}a_{ij}=c_{i}{\text{ for }}i=2,\ldots ,s.}

  8. Calculator input methods - Wikipedia

    en.wikipedia.org/wiki/Calculator_input_methods

    [1] [2] [3] On an expression or formula calculator , one types in an expression and then presses a key, such as "=" or "Enter", to evaluate the expression. [ 4 ] [ 5 ] [ 6 ] There are various systems for typing in an expression, as described below.

  9. 68–95–99.7 rule - Wikipedia

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

    3 in 5 Four or five times a week μ ± σ: 0.682 689 492 137 086 [5] 0.3173 = 31.73 % 1 in 3 Twice or thrice a week