A time-space tradeoff for sorting on non-oblivious machines

Abstract
A model of computation is introduced which permits the analysis of both the time and space requirements of non-oblivious programs. Using this model, it is demonstrated that any algorithm for sorting n inputs which is based on comparisons of individual inputs requires time-space product proportional to n2. Uniform and non-uniform sorting algorithms are presented which show that this lower bound is nearly tight.

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