Publications
Found 550 results
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Numerical solution of partial differential equations with the tau method. In: First Meeting on Numerical Methods for Partial Differential Equations (Coimbra, 1995). Vol 11. Univ. Coimbra, Coimbra; 1997. 1. p. 111-121p. (Textos Mat. Sér. B; vol 11).Edit
A autofluorescência do cristalino do doente diabético não se correlaciona com os níveis de controlo metabólico a curto prazo. Vol XX 1996.Edit
Estudo das alterações da autofluorescência corneana na diabetes Mellitus tipo I e tipo II. Vol XX 1996.Edit
Heart rate variability in brain death. {CLINICAL AUTONOMIC RESEARCH}. 1996;{6}:{141-146}.Edit
Singularities of equations of Hodgkin-Huxley type. Dynam. Stability Systems. 1996;11:91-108.Edit
Strange attractors in saddle-node cycles: prevalence and globality. Invent. Math.. 1996;125:37-74.Edit
On complete intersection affine semigroups. Comm. Algebra. 1995;23:5395-5412.Edit
Discrete time piecewise linear filtering with small observation noise. IEEE Transactions on Automatic Control. 1995;40:2149-2152.Edit
The spectral analysis of heart rate variability. A comparative study between nonparametric and parametric spectral analysis in short series . {Revista portuguesa de cardiologia : orgao oficial da Sociedade Portuguesa de Cardiologia = Portuguese journal of cardiology : an official journal of the Portuguese Society of Cardiology}. 1995;{14}:{621-626}.Edit
Centralizers and entropy. Bol. Soc. Brasil. Mat. (N.S.). 1994;25:213-222.
Maps of the two-sphere at the boundary of chaos. Nonlinearity. 1994;7:1251-1259.Edit
Rigidity of centralizers of real analytic diffeomorphisms. Ergodic Theory Dynam. Systems. 1993;13:175-197.
Rigidity of the $C^1$-centralizer of bidimensional diffeomorphisms. In: Dynamical systems ({S}antiago, 1990). Vol 285. Longman Sci. Tech., Harlow; 1993. 2. p. 211-229p. Edit
Nonconnected heterodimensional cycles: bifurcation and stability. Nonlinearity. 1992;5:1315-1341.Edit
Algebraic varieties characterizing matroids and oriented matroids. Adv. Math.. 1991;87:160-185.Edit
The least squares problems and orthogonal polynomials. In: Orthogonal polynomials and their applications (Erice, 1990). Vol 9. Baltzer, Basel; 1991. 2. p. 217-222p. (IMACS Ann. Comput. Appl. Math.; vol 9).Edit
COVARIANCE DENSITY-ESTIMATION FOR AUTOREGRESSIVE SPECTRAL MODELING OF POINT-PROCESSES. {BIOLOGICAL CYBERNETICS}. 1989;{61}:{195-203}.Edit
A simple alternative principle for rational τ-method approximation. In: Nonlinear numerical methods and rational approximation (Wilrijk, 1987). Vol 43. Reidel, Dordrecht; 1988. 4. p. 427-434p. (Math. Appl.; vol 43).Edit
Is the iterative refinement of eigenelements an expensive technique?. In: Proceedings of the 2nd international conference on computational and applied mathematics (Leuven, 1986). Vol 20.; 1987. 1. p. 159-166p.
Periodic points of a continuous map of the interval. Portugal. Math.. 1987;44:361-370.
Generalized varieties of commutative and nilpotent semigroups. Semigroup Forum. 1984;30:77-98.Edit