@article{nonconvexmatrixfactorizationis,
  title = {Nonconvex Matrix Factorization is Geodesically Convex: Global Landscape Analysis for Fixed-rank Matrix Optimization From a Riemannian Perspective},
  author = {Yuetian Luo and Nicolas Garcia Trillos},
  year = {2022},
  eprint = {2209.15130},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2209.15130v2},
}