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Sorting with Recurrent Comparison Errors

Authors Barbara Geissmann, Stefano Leucci, Chih-Hung Liu, Paolo Penna

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Barbara Geissmann
Stefano Leucci
Chih-Hung Liu
Paolo Penna

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Barbara Geissmann, Stefano Leucci, Chih-Hung Liu, and Paolo Penna. Sorting with Recurrent Comparison Errors. In 28th International Symposium on Algorithms and Computation (ISAAC 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 92, pp. 38:1-38:12, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2017)


We present a sorting algorithm for the case of recurrent random comparison errors. The algorithm essentially achieves simultaneously good properties of previous algorithms for sorting n distinct elements in this model. In particular, it runs in O(n^2) time, the maximum dislocation of the elements in the output is O(log n), while the total dislocation is O(n). These guarantees are the best possible since we prove that even randomized algorithms cannot achieve o(log n) maximum dislocation with high probability, or o(n) total dislocation in expectation, regardless of their running time.
  • sorting
  • recurrent comparison error
  • maximum and total dislocation


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