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I want to compute the conditional entropy H(A | B,C), given probability distributions for each of the variables.

It would be nice to have a right-hand side not involving conditionals. H(A|B) = H(A,B) - H(B) but how does it work out if there are more than one conditional variable?

I tried, as a dumb guess, H(A,B,C) - H(B,C), but from using it further down the line, I doubt that's correct.

Thanks!

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# Formula for entropy conditional on >1 variables?

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