Vítor Hugo Fernandes

Departamento de Matemática

vhf at fct unl pt (email)

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2021
Fernandes, Vítor H. "The Vagner-Preston representation of a block-group." Southeast Asian Bull. Math.. 45.6 (2021): 805-812. AbstractWebsite

In this short note we construct an extension of the Vagner-Preston representation for block-groups and show that its kernel is the largest congruence that separates regular elements.

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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