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26 Simplex Distributions

The simplex probabilities have support on the unit $K$-simplex for a specified $K$. A $K$-dimensional vector $\theta$ is a unit $K$-simplex if $\theta_k \geq 0$ for $k \in \{1,\ldots,K\}$ and $\sum_{k = 1}^K \theta_k = 1$.

• Dirichlet Distribution