Publications
A sequence of weakly monotonic automata with increasing level. Int. J. Algebra. 2013;7:91-100.Edit
Some order properties of the lattice of varieties of commutative semigroups. Canad. J. Math.. 1986;38:19-47.Edit
Sur certains systèmes d'équations avec contraintes dans un groupe libre. Portugal. Math.. 1999;56:409-417.Edit
[2009-39] New decidable upper bound of the second level in the Straubing-Thérien concatenation hierarchy .Edit
Exploring QT variability dependence from heart rate in coma and brain death on pediatric patients. In: Computing in Cardiology. Vol 40.; 2013. 6. p. 61-64p. Edit
A notion of branching rank for semilattices with descending chain condition. Order. 1988;4:397-409.Edit
The globals of pseudovarieties of ordered semigroups containing $B_2$ and an application to a problem proposed by Pin. Theor. Inform. Appl.. 2005;39:1-29.Edit
Projection methods based on grids for weakly singular integral equations. Applied Numerical Mathematics. 2017;Volume 114:47-54.Edit
Monoids respecting $n$-chains of intervals. J. Algebra. 1997;187:183-202.Edit
Iterated periodicity over finite aperiodic semigroups. European J. Combin.. 2014;37:115-149.Edit
Reducibility of pointlike problems. Semigroup Forum. 2017;94(2):325-335.Edit
Some key problems on finite semigroups. Semigroup Forum. 2002;64:159-179.Edit
On regular implicit operations. Portugal. Math.. 1993;50:35-61.Edit
On finite simple semigroups. Proc. Edinburgh Math. Soc. (2). 1991;34:205-215.Edit
Infinite-vertex free profinite semigroupoids and symbolic dynamics. J. Pure Appl. Algebra. 2009;213:605-631.Edit
Commutative positive varieties of languages. Acta Cybernetica. 2017;23(1):91-111.Edit
On hyperdecidable pseudovarieties of simple semigroups. Internat. J. Algebra Comput.. 2000;10:261-284.Edit
Incremental DFA Minimisation. RAIRO - Theoretical Informatics and Applications. 2014;48:173-186.Edit