Combinatorial results for certain Semigroups of Order-Preserving full Contraction Mappings of a Finite chain
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Date
2018-06-01
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Combinatorial Press
Abstract
Let Tn be the full symmetric semigroup on Xn = f1; 2; : : : ; ng
and let OCT n and ORCT n be its subsemigroups of order-preserving
and order-preserving or order-reversing full contraction mappings of
Xn, respectively. In this paper we investigate the cardinalities of
some equivalences on OCT n and ORCT n which lead naturally to
obtaining the orders of these subsemigroups. 1, 2,
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https://combinatorialpress.com