@article{iterativepreconditioningforexpeditingthe,
  title = {Iterative Pre-Conditioning for Expediting the Gradient-Descent Method: The Distributed Linear Least-Squares Problem},
  author = {Kushal Chakrabarti and Nirupam Gupta and Nikhil Chopra},
  year = {2020},
  eprint = {2008.02856},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2008.02856v2},
}