Publications
Oriented matroids: an essentially topological algebraic model Univ. Coimbra, Coimbra 1993.Edit
On the adjugate of a matrix. Amer. Math. Monthly. 2007;114:923-924.Edit
Using Simulation methods in the risk assessment of conformity criteria of concrete blocks.; 1999. 1. 135.Edit
Um Modelo Estocástico em Tempo Discreto para a Simulação de Trajectórias de uma Bóia Sujeita a Correntes de Maré e à Força do Vento 1996.Edit
On the Steinitz exchange lemma. Discrete Math.. 1995;137:367-370.Edit
Applications of $N$-fractional calculus to infinite sums. J. Fract. Calc.. 1995;8:37-42.Edit
Pentagonos, y otras figuras de muchos lados no «Libro de Algebra» de Pedro Nunes. In: 6º Encontro Luso-Brasileiro de História da Matemática. Vol Anais/Actas do 6º Encontro Luso-Brasileiro de História da Matemática. Sociedade Brasileira de História da Matemática ed. Brasil, São João d'El-Rei: Sociedade Brasileira de História da Matemática; 2014. 3. p. 331-350p. Edit
mining association rules for label ranking. advances in knowledge discovery and data mining, pt ii: 15th pacific-asia conference, pakdd 2011. 2011;6635:432-443.Edit
Neuralsyns: A Novel Tool for Simulating Large Neuronal Networks With Complex Architectures. In: Front. Neurosci. Conference Abstract: 11th Meeting of the Portuguese Society for Neuroscience. doi: 10.3389/conf. neuro. Vol 1.; 2009. Edit
Solvable monoids with commuting idempotents. Internat. J. Algebra Comput.. 2005;15:547-570.Edit
[2017-23] Intersection problem for Droms RAAGs .Edit
Modular Diophantine inequalities and rotations of numerical semigroups. J. Aust. Math. Soc.. 2008;84:315-328.Edit
A polynomial time algorithm to compute the abelian kernel of a finite monoid. Semigroup Forum. 2003;67:97-110.Edit
Rees quotients of numerical semigroups. Port. Math.. 2013;70:93-112.Edit
Abelian kernels of monoids of order-preserving maps and of some of its extensions. Semigroup Forum. 2004;68:335-356.Edit
On the weight hierarchy of codes coming from semigroups with two generators. IEEE Trans. Inform. Theory. 2014;60:282-295.Edit
$\ssfnumericalsgps$, a $\ssfGAP$ package for numerical semigroups. ACM Commun. Comput. Algebra. 2016;50:12-24.Edit
On semigroups whose idempotent-generated subsemigroup is aperiodic. Internat. J. Algebra Comput.. 2004;14:655-665.Edit
On the Frobenius number of a proportionally modular Diophantine inequality. Port. Math. (N.S.). 2006;63:415-425.Edit
On a question of Eliahou and a conjecture of Wilf. Mathematische Zeitschrift. 2018;288:595-627.Edit
Numerical semigroups with a given set of pseudo-Frobenius numbers. LMS Journal of Computation and Mathematics. 2016;19(1):186-205.Edit