Exploració per tema "Àlgebra multilineal"
Ara es mostren els items 1-20 de 41
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A geometric approach to the Carlson problem
(Society for Industrial and Applied Mathematics (Filadèlfia), 2000)
Article
Accés obertThe possible observability indices of an observable pair of matrices, when supplementary subpairs are prescribed, are characterized when the “quotient” one is nilpotent. The geometric techniques used are also valid in the ... -
A geometrical aprroach to C<sup>p</sup>-globalization of pointwise matricial relations
(1999)
Report de recerca
Accés obert -
A matrix derivation of a representation theorem for (trAp)1/p
(Universitat Politècnica de Catalunya. Centre de Càlcul, 1989)
Article
Accés obertA matrix derivation of a well-known representation theorem for (tr Ap)1/p is given, which is the solution of a restricted maximization problem. The paper further gives a solution of the corresponding restricted minimization ... -
A matrix function useful in the estimation of linear continuous-time models.
(Institut d'Estadística de Catalunya, 2006)
Article
Accés obertIn a recent publication Chen & Zadrozny (2001) derive some equations for efficiently computing eA and ∇ eA, its derivative. They employ an expression due to Bellman (1960), Snider (1964) and Wilcox (1967) for the differential ... -
A new proof of the Milliken-Akdeniz theorem
(Universitat Politècnica de Catalunya. Centre de Càlcul, 1989)
Article
Accés obertA simple proof is given for a theorem by Milliken and Akdeniz (1977) about the difference of the Moore-Penrose inverses of two positive semi-definite matrices. -
An alternative collection of structural invariants for matrix pencils under strict equivalence
(WSEAS Press. World Scientific and Engineering Academy and Society, 2009)
Article
Accés restringit per política de l'editorialWe consider pairs of matrices (E;A), representing singular linear time invariant sys- tems in the form Ex_ (t) = Ax with E;A 2 Mp£n(C) under restricted equivalence. In this paper we obtain an alternative collection of ... -
An alternative complete system of invariants for matrix pencils under strict equivalence
(WSEAS Press. World Scientific and Engineering Academy and Society, 2009-12)
Capítol de llibre
Accés restringit per política de l'editorialWe consider triples of matrices (E; A;B), representing singular linear time invariant systems in the form Ex_ (t) = Ax(t) + Bu(t), with E;A 2 Mp£n(C) and B 2 Mn£m(C), un- der proportional and derivative feedback. Using ... -
An Eigenvector pattern arising in non linear regression
(Universitat Politècnica de Catalunya. Centre de Càlcul, 1990)
Article
Accés obertLet A = (aij) be an n x n matrix defined by aij = aji = i, i = 1,...,n. This paper gives some elementary properties of A and other related matrices. The eigenstructure of A is conjectured: given an eigenvector v of A the ... -
An open set of 4×4 embeddable matrices whose principal logarithm is not a Markov generator
(Taylor & Francis, 2020-12-17)
Article
Accés obertA Markov matrix is embeddable if it can represent a homogeneous continuous-time Markov process. It is well known that if a Markov matrix has real and pairwise-different eigenvalues, then the embeddability can be determined ... -
Bisemivalues, binomial bisemivalues and multilinear extension for bicooperative games
(2015-10-05)
Report de recerca
Accés obertWe introduce bisemivalues for bicooperative games and we also provide an interesting characterization of this kind of values by means of weighting coefficients in a similar way than given for semivalues in the context of ... -
Bounding the distance of a controllable and observable system to an uncontrollable or unobservable one
(1999)
Article
Accés obertLet $(A,B,C)$ be a triple of matrices representing a time-invariant linear system $\left .\aligned \dot x(t)&=Ax(t)+Bu(t)\\y(t)&=Cx(t)\endaligned \right \}$ under similarity equivalence, corresponding to a realization ... -
Bounding the distance of a controllable system to an uncontrollable one
(1998)
Article
Accés obertLet $(A,B)$ be a pair of matrices representing a time-invariant linear system $\dot x(t)=Ax(t)+Bu(t)$ under block-similarity equivalence. In this paper we measure the distance between a controllable pair of matrices ... -
Computational procedure for a wide family of mixed coalitional values
(2015)
Text en actes de congrés
Accés restringit per política de l'editorialWe consider a family of mixed coalitional values. They apply to games with a coalition structure by combining a (induced) semivalue in the quotient game, but share within each union the payoff so obtained by applying ... -
Controllability of $\ell$-order linear systems
(2003)
Article
Accés obertGiven a (` + 1)-ple of matrices (A`¡1; : : : ;A0;B) representing `- order time-invariant linear systems, x(`) = A`¡1x(`¡1) + : : : + A0x(0) + Bu, we analyze conditions in such a way that changing the control u by u1 = u ... -
Deformaciones miniversales de parejas de tensores de segundo orden
(Universidad de Sevilla, 2007-09)
Text en actes de congrés
Accés obertConsideramos en el espacio de parejas de tensores tension y deformacion la relacion de equivalencia que se corresponde con cambios de base ortonormales. Identificandolas con parejas de matrices cuadradas, podemos utilizar ... -
Dimension of the orbit of marked subspaces
(2004)
Article
Accés obertGiven a nilpotent endomorphism, we consider the manifold of invariant subspaces having a fixed Segre characteristic. In [Linear Algebra Appl., 332–334 (2001) 569], the implicit form of a miniversal deformation of an ... -
Estimation of the noncentrality matrix of a noncentral Wishart distribution with unit scale matrix. A matrix generalitzation of Lenng's domination result
(Institut d'Estadística de Catalunya, 2004)
Article
Accés obertThe main aim is to estimate the noncentrality matrix of a noncentral Wishart distribution. The method used is Leung’s but generalized to a matrix loss function. Parallelly Leung’s scalar noncentral Wishart identity is ... -
Estudio de la influencia de diversos factores sobre el tiempo de giro de una peonza, mediante el uso de experimentos factoriales a dos niveles
(Universitat Politècnica de Barcelona. Centre de Càlcul, 1991)
Article
Accés obertEste estudio surge como respuesta a un ejercicio propuesto por la Cátedra de Estadística de la E.T.S.E.I.B. Nuestra propuesta consiste en aplicar el método de los diseños factoriales de experimentos a dos niveles, ensayando ... -
Generic families of generalized linear systems
(2003)
Article
Accés obertV. I. Arnold constructed smooth generic families of matrices with respect to similarity transformations depending smoothly on the entries of matrices with a small number of parameters. We Solve the same problem for a ... -
Matricial realizations of the solutions of the Carlson problem
(2001)
Article
Accés obertThe Klein theorem asserts the existence of a solution of the Carlson problem when a related Littelewood-Richardson sequence exists. Here we present an explicit construction of these matricial solutions.
