Lower bounds on frequency estimation of data streams

  • Authors:
  • Sumit Ganguly

  • Affiliations:
  • Indian Institute of Technology, Kanpur

  • Venue:
  • CSR'08 Proceedings of the 3rd international conference on Computer science: theory and applications
  • Year:
  • 2008

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Abstract

We consider a basic problem in the general data streaming model, namely, to estimate a vector f ∈ Zn that is arbitrarily updated (i.e., incremented or decremented) coordinate-wise. The estimate f ∈ Zn must satisfy ∥ f - f∥∞ ≤ ∈∥f∥1, that is, ∀i (|fi - fi| ≤ ∈∥f∥1). It is known to have Õ(∈-1) randomized space upper bound [6], Ω(∈-1 log(∈n)) space lower bound [4] and deterministic space upper bound of Ω(∈-2) bits. We show that any deterministic algorithm for this problem requires space Ω(∈-2(log∥f∥1)(log n)(log-1(∈-1)) bits.