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第158行： − − :<math>\operatorname{I}(X;Y) = \operatorname{I}(Y;X)</math> − − Math operatorname { i }(x; y) operatorname { i }(y; x) / math − − − −
→对称性 Symmetry
=== 对称性 Symmetry===
=== 对称性 Symmetry===
<math>\operatorname{I}(X;Y) = \operatorname{I}(Y;X)</math>
<math>\operatorname{I}(X;Y) = \operatorname{I}(Y;X)</math>
=== 条件熵与联合熵的关系 Relation to conditional and joint entropy ===
=== 条件熵与联合熵的关系 Relation to conditional and joint entropy ===