the encoder and so the procedure is you give it a Y back within the sense you find a Z that minimizes the sum of three terms the reconstruction error the regularizer and the prediction error here which is the distance from Z to the output of the encoder which is a prediction of Z if you want then once you have that Z you do one step of gradient descent in the parameters of the encoder of the decoder so the decoder tries to get it put to get closer to why and the anchor get try to guess its I'd put the bar to