update_lazy_inverse_gamma_gamma

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

Update the parameters of an inverse-gamma distribution with a gamma likelihood.

• x: The variate.
• k: Shape of the gamma.
• α: Prior shape of the inverse-gamma.
• β: Prior scale of the inverse-gamma.

Returns: the posterior hyperparameters α' and β'.