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=== Conditional entropy of independent random variables 独立随机变量的条件熵 ===

=== Conditional entropy of independent random variables 独立随机变量的条件熵 ===

Conversely, <math>H(Y|X) = \Eta(Y)</math> if and only if <math>Y</math> and <math>X</math> are [[independent random variables]].

Conversely, <math>H(Y|X) = H(Y)</math> if and only if <math>Y</math> and <math>X</math> are [[independent random variables]].

相反，当且仅当<math>Y</math>和<math>X</math>是独立随机变量时，则为<math>H(Y|X) =H(Y)</math>。

相反，当且仅当<math>Y</math>和<math>X</math>是独立随机变量时，则为<math>H(Y|X) =H(Y)</math>。

=== Chain rule 链式法则 ===

=== Chain rule 链式法则 ===