− | ei(f,Y_0)=-D_{KL}(U||P(\tilde{X}|\tilde{Y}=Y_0,f)=\frac{1}{N}\sum_{\tilde{X}}\log\frac{P(\tilde{Y_0}|\tilde{X})}{P(\tilde{Y_0})} | + | ei(f,Y_0)=-D_{KL}(U||P(\tilde{X}|\tilde{Y}=Y_0,f)=\log N+\frac{1}{N}\sum_{\tilde{X}}\log\frac{P(\tilde{Y_0}|\tilde{X})}{P(\tilde{Y_0})} |