Lower Bounds On Bitonic Sorting Networks

  title={Lower Bounds On Bitonic Sorting Networks},
  author={Tamir Levi and Ami Litman}
This paper points to an abnormal phenomena of comparator networks. For most key processing problems (such as sorting, merging or insertion) the smaller the input size the easier the problem. Surprisingly, this is not the case for Bitonic sorting. Namely, the minimal depth of a comparator network that sorts all Bitonic sequences of n keys is not monotonic in n. We show that for any n, not a power of two, the depth of a Bitonic sorter of n keys is at least dlog(n)e + 1. This contrast with Batcher… CONTINUE READING

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