def sigmoid_cross_entropy(x, t, use_cudnn=True, normalize=True):
 return SigmoidCrossEntropy(use_cudnn, normalize)(x, t)

def sigmoid_cross_entropy ( x , t , use_cudnn = True , normalize = True ) : return SigmoidCrossEntropy ( use_cudnn , normalize ) ( x , t )
computes cross entropy loss for pre-sigmoid activations .