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- W128354528 abstract "We present some problems related to right- (or bi-)invariant metrics d on the symmetric group of permutations S n . Characterizations and constructions of bi-invariant extremal (in the corresponding convex cone) metrics are given, esp. for n ⩽ 5. We also consider special subspaces of the metric space (S n , d): unit balls, sets with prescribed distances ( L -cliques), “hamiltonian” sets. Here we give (for proofs, see [3]) some results and problems arising by analogy with extremal set systems. Related problems of coding type (with Hamming metric) are considered in [1, 4]." @default.
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- W128354528 date "1980-01-01" @default.
- W128354528 modified "2023-09-29" @default.
- W128354528 title "Some Metrical Problems on Sn" @default.
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- W128354528 doi "https://doi.org/10.1016/s0167-5060(08)70875-6" @default.
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