Inverse Gamma Distribution with Threshold
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- Inverse Gamma Threshold
where 𝛤(s) is the gamma function, and 𝛾(s, 𝑥) is the lower incomplete gamma function.
Range 0 ≤ 𝑥 - 𝜃 < ∞
Scale parameter 𝛼 > 0
Shape parameter 𝛽 > 0
Threshold parameter 𝜃 < min(𝑥)
