If $X \perp Y|Z $, and $U=h(X)$, then $X \perp Y|(Z,U) $
If $X \perp Y|Z $, and $X \perp W|(Y,Z) $, then $X \perp (W,Y)|Z $
The book doesn't give any explanation. So I am confused.
2026-05-15 14:37:48.1778855868
How to show these two conditional independence relationships?
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