对于两源变量情形<math>\mathbf{R}=\{R_{1},R_{2}\}</math>,<math>I(S;R_{1})=\Pi_{\mathbf{R}}(S;\{1\})+\Pi_{\mathbf{R}}(S;\{1\}\{2\})</math>,<math> | 对于两源变量情形<math>\mathbf{R}=\{R_{1},R_{2}\}</math>,<math>I(S;R_{1})=\Pi_{\mathbf{R}}(S;\{1\})+\Pi_{\mathbf{R}}(S;\{1\}\{2\})</math>,<math> |