# Tag Info

This is the Hammersley-Clifford(-Besag) theorem:. Here is the version presented in our book. Definition: Let $(Y_1, Y_2, \ldots, Y_p) \sim g(y_1,\ldots,y_p)$, where $g^{(i)}$ denotes the marginal distribution of $Y_i$. If $g^{(i)}(y_i)> 0$ for every $i=1, \ldots, p$, implies that $$g(y_1,\ldots,y_p) > 0$$ then $g$ is said to satisfy the positivity ...