A 2-Competitive Algorithm For Online Convex Optimization With Switching Costs. Bansal, N., Gupta, A., Krishnaswamy, R., Pruhs, K., Schewior, K., & Stein, C. In APPROX/RANDOM, 2015.
bibtex   
@inproceedings{BansalGKPSS15,
  author    = {Nikhil Bansal and
               Anupam Gupta and
               Ravishankar Krishnaswamy and
               Kirk Pruhs and
               Kevin Schewior and
               Clifford Stein},
  title     = {A 2-Competitive Algorithm For Online Convex Optimization With Switching
               Costs},
  booktitle = {{APPROX/RANDOM}},
  year      = {2015}
}

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