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 monoids of monotone partial transformations of a finite chain whose domains and ranges are intervals
  • 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
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