− | EI=\frac{1}{N}\sum_{\tilde{X},\tilde{Y_0}}P(\tilde{Y_0}|\tilde{X})\log\frac{P(\tilde{Y_0}|\tilde{X})}{P(\tilde{Y_0})}=\mathbb{E}_{P(\tilde{Y_0}|\tilde{X})}(ei(f,Y_0)) | + | EI=\frac{1}{N}\sum_{\tilde{X},\tilde{Y_0}}P(\tilde{Y_0}|\tilde{X})\log\frac{P(\tilde{Y_0}|\tilde{X})}{P(\tilde{Y_0})}=\mathbb{E}_{P(\tilde{Y_0}|\tilde{X})}(ei(f,Y_0))-\log N |