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           pick random sample
           pick weighted random sample
           generate random permutation

    distributions on the real line:
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           uniform
           triangular
           normal (Gaussian)
           lognormal
           negative exponential
           gamma
           beta
           pareto
           Weibull

    distributions on the circle (angles 0 to 2pi)
    ---------------------------------------------
           circular uniform
           von Mises

General notes on the underlying Mersenne Twister core generator:

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  and is, therefore, threadsafe.

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