Optimal in-place transposition of rectangular matrices

  title={Optimal in-place transposition of rectangular matrices},
  author={A. A. Tretyakov and Eugene E. Tyrtyshnikov},
  journal={J. Complexity},
Given a rectangular m × n matrix stored as a two-dimensional array, we want to transpose it in place andmeasure the cost by the number of memory writes and the number of auxiliary cells used. We propose a transposition algorithm with optimal complexity O(mn) using only min(m, n) auxiliary memory cells. © 2009 Elsevier Inc. All rights reserved. 

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