get closer to the by minimizing this okay and there's couple papers on this that are about ten years old we used to call this predictive spas decomposition there's a form of equal lista so if you run this algorithm on natural image patches this is the running algorithm actually running and you start with random so what you see here each square is one column of the W matrix in the encoder I believe here but there is a similar one in the decoder which looks very similar and as learning proceeds of you train on more and more