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Subject

When all permutations are combinatorial similarities
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Type
Academic journal
Author
Viktoriia Bilet (Institute of Applied Mathematics and Mechanics of NASU) Oleksiy Dovgoshey (Institute of Applied Mathematics and Mechanics of NASU)
Journal
대한수학회 대한수학회보 대한수학회보 제60권 제3호 KCI Accredited Journals
Published
2023.5
Pages
733 - 746 (14page)
DOI
10.4134/BKMS.b220355

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When all permutations are combinatorial similarities
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Abstract· Keywords

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Let \((X, d)\) be a semimetric space. A permutation \(\Phi\) of the set \(X\) is a combinatorial self similarity of \((X, d)\) if there is a bijective function \(f \colon d(X \times X) \to d(X \times X)\) such that \[ d(x, y) = f(d(\Phi(x), \Phi(y))) \] for all \(x\), \(y \in X\). We describe the set of all semimetrics \(\rho\) on an arbitrary nonempty set \(Y\) for which every permutation of \(Y\) is a combinatorial self similarity of \((Y, \rho)\).

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