Fast moment estimation in data streams in optimal space

  • Authors:
  • Daniel M. Kane;Jelani Nelson;Ely Porat;David P. Woodruff

  • Affiliations:
  • Harvard University, Cambridge, MA, USA;MIT, Cambridge, MA, USA;Bar-Ilan University, Ramat-Gan, Israel;IBM Research-Almaden, San Jose, CA, USA

  • Venue:
  • Proceedings of the forty-third annual ACM symposium on Theory of computing
  • Year:
  • 2011

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Abstract

We give a space-optimal streaming algorithm with update time O(log2(1/ε)loglog(1/ε)) for approximating the pth frequency moment, 0 2). When combined with the work of [Harvey-Nelson-Onak, FOCS 2008], we also obtain the first algorithm for entropy estimation in turnstile streams which simultaneously achieves near-optimal space and fast update time.