@article{JMLR:v21:19-771,
  author  = {Jelena Diakonikolas and Crist{{\'o}}bal Guzm{{\'a}}n},
  title   = {Lower Bounds for Parallel and Randomized Convex Optimization},
  journal = {Journal of Machine Learning Research},
  year    = {2020},
  volume  = {21},
  number  = {5},
  pages   = {1--31},
  url     = {http://jmlr.org/papers/v21/19-771.html}
}