convex https://arxiv.org/pdf/2211.11052.pdf
rank https://arxiv.org/pdf/2103.03404.pdf
https://arxiv.org/pdf/2204.10532.pdf
https://arxiv.org/pdf/2110.10090.pdf
https://arxiv.org/pdf/2210.02671.pdf
https://arxiv.org/pdf/2210.05675.pdf
https://arxiv.org/pdf/1908.11775.pdf
https://arxiv.org/pdf/2205.13401.pdf
https://openreview.net/pdf?id=ByxRM0Ntvr
http://proceedings.mlr.press/v119/bhojanapalli20a/bhojanapalli20a.pdf
set
http://proceedings.mlr.press/v97/lee19d/lee19d.pdf
operator
https://www.jmlr.org/papers/volume23/21-1521/21-1521.pdf
general