更改

mutual information is the Kullback–Leibler divergence of the product of the marginal distributions, 𝑝𝑋⋅𝑝𝑌, from the joint distribution 𝑝(𝑋,𝑌), that is,

mutual information is the Kullback–Leibler divergence of the product of the marginal distributions, 𝑝𝑋⋅𝑝𝑌, from the joint distribution 𝑝(𝑋,𝑌), that is,

互信息是边缘分布乘积的相对熵，也就是联合分布<math>p_{(X,Y)}</math>的乘积，即：

互信息是边缘分布乘积的相对熵 <math>D_{KL}</math>，也就是联合分布<math>p_{(X,Y)}</math>的乘积，即：