Publications

Almeida R, Pueyo E, Martínez JP, Rocha AP, Laguna P. Quantification of the QT variability related to HRV: Robustness study facing automatic delineation and noise on the ECG. In: {31st Annual Scientific Meeting on Computers in Cardiology}. Vol {31}. {IEEE}; 2004. {. {p. 769-772p. }.
Martínez JP, Almeida R, Olmos S., Rocha AP, Laguna P. A wavelet-based ECG delineator: Evaluation on standard databases. {IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING}. 2004;{51}:{570-581}.
Teixeira A., Rocha AP, Almeida R. The analysis of heart rate variability using independent component signals. In: Tilg B., editor. {2nd IASTED International Conference on Biomedical Engineering}. {ACTA PRESS}; 2004. {. {p. 240-243p. }.
Delgado M, Fernandes VH, Margolis S, Steinberg B. On semigroups whose idempotent-generated subsemigroup is aperiodic. Internat. J. Algebra Comput.. 2004;14:655-665.
Simões L, de Oliveira PM, Costa AP. Simulation and modelling of vehicule’s delay at semi-actuated signalized intersections. In: Compstat’2004 symposium.; 2004. 1. p. 1823-1830p.
Delgado M, Fernandes VH. Abelian kernels of monoids of order-preserving maps and of some of its extensions. Semigroup Forum. 2004;68:335-356.
Matos J, Rodrigues MJ, Vasconcelos PB. New implementation of the tau method for PDEs. In: Proceedings of the 10th International Congress on Computational and Applied Mathematics (ICCAM-2002). Vol 164/165.; 2004. 5. p. 555-567p.
Silva PV. An application of first-order logic to the study of recognizable languages. Internat. J. Algebra Comput.. 2004;14:785-799.
Silva PV, Steinberg B. A geometric characterization of automatic monoids. Q. J. Math.. 2004;55:333-356.
Silva PV. Free group languages: rational versus recognizable. Theor. Inform. Appl.. 2004;38:49-67.
da Costa JF, Rao P.. Central partition for a partition-distance and strong pattern graph. REVSTAT. 2004;2:127-143.
Yakubovich SB. On the Lebedev transformation in Hardy's spaces. Int. J. Math. Math. Sci.. 2004:3603-3616.
Yakubovich SB. On a new index transformation related to the product of Macdonald functions. Rad. Mat.. 2004;13:63-85.
Yakubovich SB. On the least values of $L_p$-norms for the Kontorovich-Lebedev transform and its convolution. J. Approx. Theory. 2004;131:231-242.
Yakubovich SB. Index transforms associated with generalized hypergeometric functions. Math. Methods Appl. Sci.. 2004;27:35-46.
Alves JF. Strong statistical stability of non-uniformly expanding maps. Nonlinearity. 2004;17:1193-1215.
Alves JF, Luzzatto S, Pinheiro V. Lyapunov exponents and rates of mixing for one-dimensional maps. Ergodic Theory Dynam. Systems. 2004;24:637-657.
Alves JF, Araújo V. Hyperbolic times: frequency versus integrability. Ergodic Theory Dynam. Systems. 2004;24:329-346.
Labouriau IS, Alves-Pinto C. Loss of synchronization in partially coupled Hodgkin-Huxley equations. Bull. Math. Biol.. 2004;66:539-557.
Lomp C. Integrals in Hopf algebras over rings. Comm. Algebra. 2004;32:4687-4711.
Lomp C. When is a smash product semiprime? A partial answer. J. Algebra. 2004;275:339-355.
Carvalho P, de Oliveira AG. Intersection and linking numbers in oriented matroids. Discrete Comput. Geom.. 2004;31:305-321.
Almeida J, Escada AP. The globals of some subpseudovarieties of DA. Internat. J. Algebra Comput.. 2004;14:525-549.
Almeida J, Machiavelo A. José Morgado: in memoriam. Bol. Soc. Port. Mat.. 2004:1-18.
Hunziker M, Machiavelo A, Park J. Chebyshev polynomials over finite fields and reversibility of σ-automata on square grids. Theoret. Comput. Sci.. 2004;320:465-483.
Silva MC, Duarte AL, de Sá CC. Francisco Gomes Teixeira. CIM Bulletin. 2004;16:21-23.
Dias A., Stewart I.. Symmetry Groupoids and Admissible Vector Fields for Coupled Cell Networks. Journal of the London Mathematical Society. 2004;69:707-736.
Rosales J., García-Sánchez PA. Numerical semigroups with embedding dimension three. Arch. Math. (Basel). 2004;83:488-496.
García-Sánchez PA, Rosales JC. Every positive integer is the Frobenius number of an irreducible numerical semigroup with at most four generators. Ark. Mat.. 2004;42:301-306.
Rosales J., García-Sánchez PA, García-García JI, Madrid J.. Fundamental gaps in numerical semigroups with respect to their multiplicity. Acta Math. Sin. (Engl. Ser.). 2004;20:629-646.