Publications
Implicit operations on certain classes of semigroups. In: Semigroups and their applications (Chico, Calif., 1986). Reidel, Dordrecht; 1987. 1. p. 1-11p. Edit
José Morgado: in memoriam. Bol. Soc. Port. Mat.. 2004:1-18.Edit
Sur certains systèmes d'équations avec contraintes dans un groupe libre–-addenda. Port. Math. (N.S.). 2001;58:379-387.Edit
[2006-20] Representation theory of finite semigroups, semigroup radicals and formal language theory .Edit
Improved QT variability quantification by multilead automatic delineation. In: {32nd Annual Conference on Computers in Cardiology}. Vol {32}. {IEEE}; 2005. {. {p. 503-506p. }.Edit
On the power semigroup of a finite semigroup. Portugal. Math.. 1992;49:295-331.Edit
New decidable upper bound of the second level in the Straubing-Thérien concatenation hierarchy of star-free languages. Discrete Math. Theor. Comput. Sci.. 2010;12:41-58.Edit
On fixed points of the lower set operator. Int. J. Algebra Comput.. 2015;25(1-2):259-292.Edit
On the decidability of iterated semidirect products with applications to complexity. Proc. London Math. Soc. (3). 2000;80:50-74.Edit
Semigrupos finitos e álgebra universal Universidade de São Paulo, Instituto de Matemática e Estatí stica, São Paulo 1991.Edit
Semisimple synchronizing automata and the Wedderburn-Artin theory. Internat. J. Foundat. Comput. Sci.. 2016;27(2):127-145.Edit
Tameness of the pseudovariety of abelian groups. Internat. J. Algebra Comput.. 2005;15:327-338.Edit
The equation $\bf PX=\bf PJ$. In: Proceedings of the International Symposium on the Semigroup Theory and its Related Fields (Kyoto, 1990). Shimane Univ., Matsue; 1990. 1. p. 1-11p. Edit
Decidability and tameness in the theory of finite semigroups. Bull. Iranian Math. Soc.. 2008;34:1-22.Edit
Reducibility of pointlike problems. Semigroup Forum. 2017;94(2):325-335.Edit
Commutative positive varieties of languages. Acta Cybernetica. 2017;23(1):91-111.Edit
The pseudovariety $\bf J$ is hyperdecidable. RAIRO Inform. Théor. Appl.. 1997;31:457-482.Edit
Forecasting Asthma Hospital Admissions from Remotely Sensed Environmental Data. In: Proceedings of the 3rd International Conference on Geographical Information Systems Theory, Applications and Management - Volume 1: GISTAM,. INSTICC; 2017. 1. p. 124-130p. Edit
[2017-25] On the insertion of n-powers .Edit
On power varieties of semigroups. J. Algebra. 1989;120:1-17.Edit
Tameness of pseudovariety joins involving R. Monatsh. Math.. 2005;146:89-111.Edit
Dynamics of finite semigroups. In: Semigroups, algorithms, automata and languages (Coimbra, 2001). World Sci. Publ., River Edge, NJ; 2002. 2. p. 269-292p. Edit