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- W4210268048 abstract "The presented research is devoted to the problem of developing new combinatorial generation algorithms for combinations. In this paper, we develop a modification of Ruskey’s algorithm for unranking m-combinations of an n-set in co-lexicographic order. The proposed modification is based on the use of approximations to make a preliminary search for the values of the internal parameter k of this algorithm. In contrast to the original algorithm, the obtained algorithm can be effectively applied when n is large and m is small because the running time of this algorithm depends only on m. Furthermore, this algorithm can be effectively used when n and m are both large but n−m is small, since we can consider unranking (n−m)-combinations of an n-set. The conducted computational experiments confirm the effectiveness of the developed modification." @default.
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- W4210268048 date "2022-01-25" @default.
- W4210268048 modified "2023-09-27" @default.
- W4210268048 title "Unranking Small Combinations of a Large Set in Co-Lexicographic Order" @default.
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- W4210268048 doi "https://doi.org/10.3390/a15020036" @default.
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