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  2. Symmetric mean absolute percentage error - Wikipedia

    en.wikipedia.org/wiki/Symmetric_mean_absolute...

    Provided the data are strictly positive, a better measure of relative accuracy can be obtained based on the log of the accuracy ratio: log(F t / A t) This measure is easier to analyze statistically and has valuable symmetry and unbiasedness properties.

  3. Mean motion - Wikipedia

    en.wikipedia.org/wiki/Mean_motion

    In orbital mechanics, mean motion (represented by n) is the angular speed required for a body to complete one orbit, assuming constant speed in a circular orbit which completes in the same time as the variable speed, elliptical orbit of the actual body. [1]

  4. Absolute space and time - Wikipedia

    en.wikipedia.org/wiki/Absolute_space_and_time

    Robert S. Westman writes that a "whiff" of absolute space can be observed in Copernicus's De revolutionibus orbium coelestium, where Copernicus uses the concept of an immobile sphere of stars. [ 2 ] Newton

  5. Movimiento Nacional - Wikipedia

    en.wikipedia.org/wiki/Movimiento_Nacional

    The Movimiento Nacional (English: National Movement) was a governing institution of Spain established by General Francisco Franco during the Spanish Civil War in 1937. During Francoist rule in Spain, it purported to be the only channel of participation in Spanish public life. [ 1 ]

  6. Citizens' Movement (Mexico) - Wikipedia

    en.wikipedia.org/wiki/Citizens'_Movement_(Mexico)

    Citizens' Movement (Spanish: Movimiento Ciudadano) is a center-left political party in Mexico. It was founded in 1999 under the name Convergence for Democracy, which was then shortened to Convergence in 2002 and changed to Citizens' Movement in 2011.