Vítor Hugo Fernandes
Departamento de Matemática
vhf at fct unl pt
(email)
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On generators and relations for unions of semigroups
Citation:
Araújo, Isabel M., Mário J. J. Branco, Vitor H. Fernandes, Gracinda M. S. Gomes, and N. Ruškuc. "On generators and relations for unions of semigroups." Semigroup Forum. 63 (2001): 49-62.
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Recent Publications
On the monoid of partial order-preserving transformations of a finite chain whose domains and ranges are intervals
On oriented alternating inverse monoids
On monotone alternating inverse monoids
Groups of permutations preserving orientation (parity) of subsets of a fixed size, and related monoids
Presentations for monoids of endomorphisms of a star graph
Presentations for monoids of partial endomorphisms of a star graph
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