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A presortedness measure describes to which extent a sequence of key values to be sorted is already partially sorted. We introduce… Expand In this paper we introduce two efficient priority queues. For both, insert requires O(1) amortized time and extract-min$O(\lg n… Expand We study the performance of the most practical inversion-sensitive internal sorting algorithms. Experimental results illustrate… Expand We study the performance of the most practical internal adaptive sorting algorithms. Experimental results show that adaptive AVL… Expand Adaptivity in sorting algorithms is sometimes gained at the expense of practicality. We give experimental results showing that… Expand