import tensorflow as tf

                                                    tf.transpose(
                                                    tf.matmul(tf.abs(self.W_rec) * self.rec_Connectivity,self.Dale_rec)),
                                                    axes=1) * \
                                        tf.where(tf.greater(xt, 0), tf.ones_like(xt), tf.zeros_like(xt))
        denom = dxt

