Publications

Cruz I. Degeneracy of some Lie algebras Univ. Coimbra, Coimbra 1999.
da Rocha Z.. Shohat-Favard and Chebyshev's methods in d-orthogonality. Numerical Algorithms. 1999;20:139-164.
de Oliveira PM, Picard J.. Approximate Nonlinear Filtering for a Two-dimensional Diffusion with One Dimensional Observations in a Low Noise Channel. In: Prépublication du Laboratoire de Mathématiques Appliquées.; 1999.
da Rocha Z.. QD-algorithms and recurrence relations for biorthogonal polynomials. Journal of Computational and Applied Mathematics. 1999;107:53{72.
Gambaudo J-, Rocha J.. Erratum: ``Maps of the two-sphere at the boundary of chaos'' [Nonlinearity \bf 7 (1994), no. 4, 1251–1259; MR1284691 (95e:58107)]. Nonlinearity. 1999;12:443.
Cruz I. A family of degenerate Lie algebras. J. Geom. Phys.. 1999;31:51-63.
Petrich M, Silva PV. On presentations of semigroup rings. Boll. Unione Mat. Ital. Sez. B Artic. Ric. Mat. (8). 1999;2:127-142.
Petrich M., Silva PV. On directly infinite rings. Acta Math. Hungar.. 1999;85:153-165.
Petrich M, Silva PV. On quasi directly infinite rings. Acta Sci. Math. (Szeged). 1999;65:61-75.
Yakubovich SB, de Graff J.. On Parseval equalities and boundedness properties for Kontorovich-Lebedev type operators. Novi Sad J. Math.. 1999;29:185-205.
Yakubovich SB. On Lebedev type integral transformations associated with modified Bessel functions. Nieuw Arch. Wisk. (4). 1999;17:219-227.
Yakubovich SB, Fisher B. A class of index transforms with general kernels. Math. Nachr.. 1999;200:165-182.
Lomp C. On semilocal modules and rings. Comm. Algebra. 1999;27:1921-1935.
Almeida J. Power exponents of aperiodic pseudovarieties. Semigroup Forum. 1999;59:18-32.
Almeida J, Delgado M.. Sur certains systèmes d'équations avec contraintes dans un groupe libre. Portugal. Math.. 1999;56:409-417.
Almeida J. Hyperdecidable pseudovarieties and the calculation of semidirect products. Internat. J. Algebra Comput.. 1999;9:241-261.
Almeida J. Some algorithmic problems for pseudovarieties. Publ. Math. Debrecen. 1999;54:531-552.
Almeida J, Azevedo A, Zeitoun M. Pseudovariety joins involving $\scr J$-trivial semigroups. Internat. J. Algebra Comput.. 1999;9:99-112.
Carvalho M. Commuting expanding dynamics. Portugaliae Mathematica. 1999;56(4):443-463.
Dias A., Stewart I.. Symmetry-breaking Bifurcations of Wreath Product Systems. Journal of Nonlinear Science . 1999;9:671-695.
Rosales J., García-Sánchez PA. Presentations for subsemigroups of finitely generated commutative semigroups. Israel J. Math.. 1999;113:269-283.
Rosales J., García-Sánchez PA, Urbano-Blanco J.. On presentations of commutative monoids. Internat. J. Algebra Comput.. 1999;9:539-553.
García-Sánchez PA, Rosales J.. Numerical semigroups generated by intervals. Pacific J. Math.. 1999;191:75-83.
Rosales J., García-Sánchez PA. On free affine semigroups. Semigroup Forum. 1999;58:367-385.
Rosales J., García-Sánchez PA. On the structure of Cohen-Macaulay simplicial affine semigroups. Comm. Algebra. 1999;27:511-518.
Rosales J., García-Sánchez PA. On normal affine semigroups. Linear Algebra Appl.. 1999;286:175-186.
Costa JP. Mining binary attributes. Ebecken N.FF, editor 1998.
Basto-Gonçalves J. Second-order conditions for local controllability. Systems Control Lett.. 1998;35:287-290.
Teles M., de Oliveira PM. Risks Associated to the compressive Strength Conformity Criteria Resulting from the Application of the Portuguese Standard NP ENV 206 (1993). In: Proceedings of the European Ready Mixed Concrete Congress - ERMCO 1998. Vol 1.; 1998. 3. p. 304-311p.
Almeida J, Silva PV. On the hyperdecidability of semidirect products of pseudovarieties. Comm. Algebra. 1998;26:4065-4077.