The black-box complexity of nearest-neighbor search

  title={The black-box complexity of nearest-neighbor search},
  author={Robert Krauthgamer and James R. Lee},
  journal={Theor. Comput. Sci.},
We define a natural notion of efficiency for approximate nearest-neighbor (ANN) search in general n-point metric spaces, namely the existence of a randomized algorithm which answers (1 + ε)-ANN queries in polylog(n) time using only polynomial space. We then study which families of metric spaces admit efficient ANN schemes in the black-box model, where only oracle access to the distance function is given, and any query consistent with the triangle inequality may be asked. For ε < 5 , we offer a… CONTINUE READING
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