Consider an alternative information measure: given a joint distribution Pxy, define M(X→Y) = – log > min x:Px(x)>0 PY|x (y|x). YƐY Show that M (X→Y) >0, with equality if and only if X and Y are independent.

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Consider an alternative information measure: given a joint distribution Pxy, define
M(X→Y)= - log min
Py|x (y|x).
x:Px (x)>0
YEY
a)
Show that M (X→Y) >0, with equality if and only if X and Y are independent.
Transcribed Image Text:Consider an alternative information measure: given a joint distribution Pxy, define M(X→Y)= - log min Py|x (y|x). x:Px (x)>0 YEY a) Show that M (X→Y) >0, with equality if and only if X and Y are independent.
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