Mathematical studies. Homage to Professor Doctor Luís de Albuquerque. (Q2763533)

The articles of this volume will be reviewed individually.NEWLINENEWLINEIndexed articles:NEWLINENEWLINE\textit{Almeida, P.}, Noncommutative Poincaré lemma, 1-16 [Zbl 0994.22004]NEWLINENEWLINE\textit{Bebiano, Natália; de Providência, João}, Some geometrical properties of the c-numerical range of a normal matrix, 17-32 [Zbl 1002.15501]NEWLINENEWLINE\textit{Craveiro de Carvalho, F. J.}, Athwartness: Some necessary and some sufficient conditions, 33-40 [Zbl 0991.57030]NEWLINENEWLINE\textit{Leál Duarte, António}, A note on normed matrices., 41-45 [Zbl 1160.15307]NEWLINENEWLINE\textit{Leal Duarte, António; Carvalho e Silva, Jaime}, A contribution to the study of the influence of the mathematical work of Jose Anastacio da Cunha, 47-67 [Zbl 1009.01009]NEWLINENEWLINE\textit{Gouveia, M. C.; Puystjens, R.}, About the group-inverse and Moore-Penrose inverse for Hankel and Toeplitz matrices over rings with the extended Rao condition, 69-75 [Zbl 1032.15500]NEWLINENEWLINE\textit{Gracia, Juan M.; De Hoyos, Immaculada}, Continuity points of canonical forms of matrices, 77-106 [Zbl 1032.15501]NEWLINENEWLINE\textit{Júdice, J. J.}, An extension of the linear complementary problem, 107-120 [Zbl 1002.90543]NEWLINENEWLINE\textit{Silva Leite, F.; Vitória, José}, Generalization of the De Moîvre formulas for quaternions and octonions, 121-133 [Zbl 0997.30504]NEWLINENEWLINE\textit{Machado, Armando}, A new proof and a unified version of some well-known formulas of Lie group theory, 135-140 [Zbl 0994.22007]NEWLINENEWLINE\textit{de Queirós Vieira Martins, Ernesto}, The simplex method and the shortest path problem., 141-156 [Zbl 1159.90502]NEWLINENEWLINE\textit{Sampaio Martins, J. A.}, On the approximation numbers of embeddings of sequence spaces., 157-168 [Zbl 1134.41339]NEWLINENEWLINE\textit{Sampaio Martins, J. A.}, Inequalities of Rado-Popoviciu type., 169-175 [Zbl 1096.26505]NEWLINENEWLINE\textit{de A. P. Martins, Pedro}, Spherical functions of a Coulomb wave in the interval \(0<\rho <<2\gamma\), 177-186 [Zbl 1004.65033]NEWLINENEWLINE\textit{Fernandes Miranda, Maria Emília}, Remarks on normal matrices., 187-192 [Zbl 1159.15304]NEWLINENEWLINE\textit{Morgado, José}, A note on the endomorphisms of a group defined by commutators, 193-204 [Zbl 0996.20500]NEWLINENEWLINE\textit{Novais, Maria Helena}, A note on the butterfly theorem, 205-210 [Zbl 0992.51008]NEWLINENEWLINE\textit{Oliveira, F. Aleixo}, Linear systems in interval analysis, 211-222 [Zbl 1002.65509]NEWLINENEWLINE\textit{De Oliveira, Paula; Patrício, Fernanda}, On the estimation of the solution of a linear difference equation with variable coefficients, 223-235 [Zbl 1006.65083]NEWLINENEWLINE\textit{Oliveira, Paulo Eduardo}, Infinitely divisible measures, 237-253 [Zbl 1004.28008]NEWLINENEWLINE\textit{Osório, J.; Vergueiro, I.}, Preliminary orbit determination, 255-266 [Zbl 0992.85501]NEWLINENEWLINE\textit{Sousa Pinto, J.}, Sampling expansions for functions of compact Mellin spectrum., 267-284 [Zbl 1044.42031]NEWLINENEWLINE\textit{Dinis Rodrigues, Maria Rosália}, Temperature simulation. (A class of optimization methods by thermodynamical analogy), 285-294 [Zbl 0988.80500]NEWLINENEWLINE\textit{Rosa, Mário S.}, Matrix games and linear programming., 295-300 [Zbl 1159.90456]NEWLINENEWLINE\textit{Marques de Sá, Eduardo}, Solutions to \(AX-XA=I\) and its invariants, 301-325 [Zbl 1002.15500]NEWLINENEWLINE\textit{de J.da Silva, Manuel Rogério}, Iteration of Bernstein polynomials in two independent real variables and identification of the linear operators which commutate with them, 327-341 [Zbl 1003.41500]NEWLINENEWLINE\textit{Zaballa, Ion}, On conjugated canonical forms, 343-357 [Zbl 1020.15009]