Publications

Kha\u\i NT, Yakubovich SB. Some two-dimensional integral transformations of convolution type. Dokl. Akad. Nauk BSSR. 1990;34:396-398, 474.
Bokowski J, de Oliveira AG. Simplicial convex $4$-polytopes do not have the isotopy property. Portugal. Math.. 1990;47:309-318.
Almeida J. An elementary proof that finite groups are projectively torsion-free. Portugal. Math.. 1990;47:437-444.
Almeida J. On pseudovarieties, varieties of languages, filters of congruences, pseudoidentities and related topics. Algebra Universalis. 1990;27:333-350.
Almeida J. Semidirectly closed pseudovarieties of locally trivial semigroups. Semigroup Forum. 1990;40:315-323.
Lago PJ, Rocha AP, Jones N.. COVARIANCE DENSITY-ESTIMATION FOR AUTOREGRESSIVE SPECTRAL MODELING OF POINT-PROCESSES. {BIOLOGICAL CYBERNETICS}. 1989;{61}:{195-203}.
Almeida J. Residually finite congruences and quasi-regular subsets in uniform algebras. Portugal. Math.. 1989;46:313-328.
Almeida J, Azevedo A. The join of the pseudovarieties of $\scr R$-trivial and $\scr L$-trivial monoids. J. Pure Appl. Algebra. 1989;60:129-137.
Almeida J. Semidirect products of pseudovarieties from the universal algebraist's point of view. J. Pure Appl. Algebra. 1989;60:113-128.
Almeida J. The algebra of implicit operations. Algebra Universalis. 1989;26:16-32.
Almeida J. On power varieties of semigroups. J. Algebra. 1989;120:1-17.
Farr W., Li C, Labouriau IS, Langford W.. Degenerate Hopf bifurcation formulas and Hilbert's 16th problem. SIAM J. Math. Anal.. 1989;20:13-30.
Labouriau IS. Degenerate Hopf bifurcation and nerve impulse. II. SIAM J. Math. Anal.. 1989;20:1-12.
Basto-Gonçalves J. Control of a neoclassic economic model. Portugal. Math.. 1988;45:417-428.
Tuan VK, Yakubovich SB. Kantorovich-Lebedev transformation of functions that admit exponential growth. Mat. Fiz. Neline\uın. Mekh.. 1988:6-9, 85.
Cordovil R, A. de Oliveira G, M. Moreira L. Parallel projection of matroid spheres. Portugal. Math.. 1988;45:337-346.
Almeida J. A notion of branching rank for semilattices with descending chain condition. Order. 1988;4:397-409.
Almeida J. Some pseudovariety joins involving the pseudovariety of finite groups. Semigroup Forum. 1988;37:53-57.
Basto-Gonçalves J. Sufficient conditions for local controllability with unbounded controls. SIAM J. Control Optim.. 1987;25:1371-1378.
Almeida J. Residually finite congruences and quasiregular subsets in uniform algebras. In: Proceedings of the Second Meeting of Portuguese Algebraists (Portuguese) (Porto, 1987). Univ. Porto, Porto; 1987. 1. p. 11-31p.
Basto-Gonçalves J. Controllability in codimension one. J. Differential Equations. 1987;68:1-9.
d'Almeida FD, Rodrigues MJ. 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.
Basto-Gonçalves J. Realization theory for Hamiltonian systems. SIAM J. Control Optim.. 1987;25:63-73.
Rocha J. Periodic points of a continuous map of the interval. Portugal. Math.. 1987;44:361-370.
Yakubovich SB, Tuan VK, Marichev O., Kalla SL. A class of index integral transforms. Rev. Técn. Fac. Ingr. Univ. Zulia. 1987;10:105-118.
Yakubovich SB. On the convolution for the Kontorovich-Lebedev transformation and its applications to integral equations. Dokl. Akad. Nauk BSSR. 1987;31:101-103, 188.
Basto-Gonçalves J. Minimal-dimensional realizations of Hamiltonian control systems. In: Theory and applications of nonlinear control systems ({S}tockholm, 1985). North-Holland, Amsterdam; 1986. 2. p. 233-240p.
Yakubovich SB. A general approach to the theory of integral transforms with respect to an index. Izv. Vyssh. Uchebn. Zaved. Mat.. 1986:77-79, 84.
Tuan VK, Marichev O., Yakubovich SB. Compositional structure of integral transformations. Dokl. Akad. Nauk SSSR. 1986;286:786-790.
Almeida J. Power pseudovarieties of semigroups. I, II. Semigroup Forum. 1986;33:357-373, 375-390.