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  2. Fractional model - Wikipedia

    en.wikipedia.org/wiki/Fractional_model

    In applied statistics, fractional models are, to some extent, related to binary response models. However, instead of estimating the probability of being in one bin of a dichotomous variable , the fractional model typically deals with variables that take on all possible values in the unit interval .

  3. Fractional differencing and fractional integration are the same operation with opposite values of d: e.g. the fractional difference of a time series to d = 0.5 can be inverted (integrated) by applying the same fractional differencing operation (again) but with fraction d = -0.5. See GRETL fracdiff function.

  4. Lehman Formula - Wikipedia

    en.wikipedia.org/wiki/Lehman_Formula

    For example, if an investor wished to sell $3 million worth of stock, he would pay the broker he used a fee of 5%, or $50,000, on the first million dollars of transaction value, 4% (40,000) of the second million, and 3% (30,000)of the third million, for a total fee of $120,000. On an investment of $50 million, the total fee would be $600,000.

  5. Fractional ownership - Wikipedia

    en.wikipedia.org/wiki/Fractional_ownership

    Fractional ownership offers an individual or company the option to purchase a share of an aircraft. Shares from as little as 1/16 of an aircraft, which offers approximately 37.5 hours of flight time per year, to 1/2 of an aircraft can be purchased, depending on the needs of the operator.

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  7. Fractional-order system - Wikipedia

    en.wikipedia.org/wiki/Fractional-order_system

    By applying a Laplace transform to the LTI system above, the transfer function becomes = () = = =For general orders and this is a non-rational transfer function. Non-rational transfer functions cannot be written as an expansion in a finite number of terms (e.g., a binomial expansion would have an infinite number of terms) and in this sense fractional orders systems can be said to have the ...

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  9. Fractional calculus - Wikipedia

    en.wikipedia.org/wiki/Fractional_calculus

    Fractional calculus was introduced in one of Niels Henrik Abel's early papers [3] where all the elements can be found: the idea of fractional-order integration and differentiation, the mutually inverse relationship between them, the understanding that fractional-order differentiation and integration can be considered as the same generalized ...