logpdf_lazy_beta_negative_binomial

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function logpdf_lazy_beta_negative_binomial(x:Expression<Integer>, k:Expression<Integer>, α:Expression<Real>, β:Expression<Real>) -> Expression<Real>

Observe a beta-negative-binomial variate

• x: The variate.
• k: Number of successes.
• α: Shape.
• β: Shape.

Returns: the log probability mass.