Review for NeurIPS paper: Proximity Operator of the Matrix Perspective Function and its Applications

Summary and Contributions: ### Update ### I have read the rebuttal and the other reviews. I'd like to thank to the authors for their carefully thought-out response. In general, I agree with their position that the organization and exposition are the weakest aspects of the submission. I have increased my score to 7 given the authors' commitment to improve the text and address my and the other reviewers' specific comments. Some point-by-point comments follow: 1) Great, I think readability will be greatly improved when the two sections are merged.