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De-Biao Li

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Sep 2026

Oriented partial permutation semigroups with restricted range

Let [Formula: see text] be a finite chain with [Formula: see text] elements [Formula: see text], and let [Formula: see text] be the semigroup of all either orientation-preserving or orientation-reversing injective partial transformations of [Formula: see text]. In this paper, for any nonempty subset [Formula: see text]...

De-Biao Li · 0 citations

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