logpdf_lazy_inverse_gamma_gamma
function logpdf_lazy_inverse_gamma_gamma(x:Expression<Real>, k:Expression<Real>, α:Expression<Real>, β:Expression<Real>) -> Expression<Real>
Observe a compound-gamma variate.
- x: The variate.
- k: Shape.
- α: Prior shape.
- β: Prior scale.
Return: the log probability density.