Trivial Description
The LargeMeanPoissonSampler requires a Poisson sample using a mean of <1 when the mean is fractional. This is done using a SmallMeanPoissonSampler. This can be changed to a KempSmallMeanPoissonSampler which has more stable performance with RNGs that are very slow. This is due to the algorithm requiring only 1 uniform deviate per sample.
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RNG-91 Kemp small mean poisson sampler
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