Exploració per autor "Magret Planas, Maria dels Dolors"
Ara es mostren els items 19-35 de 35
-
Introducción a la teoría de matrices polinomiales
García Planas, María Isabel; Magret Planas, Maria dels Dolors (Edicions UPC, 1999)
Llibre
Accés restringit a la comunitat UPCEl presente libro proporciona un tratamiento comprensivo de la teoría de matrices polinomiales, que es una parte del álgebra lineal cuyos conceptos y resultados principales han sido obtenidos en las dos últimas décadas y ... -
Isometries of the hamming space and equivalence relations of linear codes over a finite field
García Planas, María Isabel; Magret Planas, Maria dels Dolors (Springer, 2016)
Capítol de llibre
Accés restringit per política de l'editorialDetection and error capabilities are preserved when applying to a linear code an isomorphism which preserves Hamming distance. We study here two such isomorphisms: permutation isometries and monomial isometries -
Miniversal Deformations of Bimodal Picewise Linear Systems
Ferrer Llop, Josep; Magret Planas, Maria dels Dolors; Pacha Andújar, Juan Ramón; Peña Carrera, Marta (Servicio de publicaciones de la UPV, 2010)
Comunicació de congrés
Accés obertBimodal linear systems are those consisting of two linear systems on each side of a given hyperplane, having continuous dynamics along that hyperplane. In this work, we focus on the derivation of (orthogonal) miniversal ... -
Monomial codes seen as invariant subspaces
García Planas, María Isabel; Magret Planas, Maria dels Dolors; Um, Laurence Emilie (2017)
Article
Accés obertIt is well known that cyclic codes are very useful because of their applications, since they are not computationally expensive and encoding can be easily implemented. The relationship between cyclic codes and invariant ... -
Mòduls locals de sistemes dinàmics lineals amb coeficients constants
Magret Planas, Maria dels Dolors (Universitat Politècnica de Catalunya, 1997-02-17)
Tesi
Accés obertLa present memòria estudia l'estabilitat estructural de ternes de matrius. Es ben conegut que els sistemes dinàmic lineals amb coeficients constants poden venir definits per ternes de matrius, d'aquí l'interès d'aquest ... -
On the existence of a common eigenvector for all matrices in the commutant of a single matrix
Magret Planas, Maria dels Dolors; Montoro López, María Eulalia (Elsevier, 2012-09)
Article
Accés restringit per política de l'editorialThe main purpose of this paper is to study common invariant subspaces of any matrix in the centralizer of a given matrix A∈Mn(F), where F denotes an algebraically closed field. In particular, we obtain a necessary and ... -
Permutation non-isometric linear codes over a finite field
García Planas, María Isabel; Magret Planas, Maria dels Dolors (Universidad de Cádiz, 2015)
Text en actes de congrés
Accés restringit per política de l'editorialA method for the enumeration of permutation non-isometric linear codes is presented -
Perturbation of matrices preserving the Segre characteristics of the non-nilpotent Jordan blocks
Magret Planas, Maria dels Dolors (2017-06-26)
Capítol de llibre
Accés restringit per política de l'editorialAbstract We consider in the space of square matrices with complex co- efficients the following equivalence relation: two matrices are said to be equivalent if and only if the direct sum of the non- nilpotent Jordan ... -
Perturbation of quadrics
Clotet Juan, Josep; Magret Planas, Maria dels Dolors; Puerta Coll, Xavier (2000)
Article
Accés obertThe aim of this paper is to study what happens when a slight perturbation affects the coefficients of a quadratic equation defining a variety (a quadric) in R^n. Structurally stable quadrics are those a small perturbation ... -
Planar bimodal piecewise linear systems. Bifurcation diagrams
Ferrer Llop, Josep; Magret Planas, Maria dels Dolors; Pacha Andújar, Juan Ramón; Peña Carrera, Marta (2010)
Article
Accés obert -
Some considerations about reachability of switched linear singular systems
Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2015-11-30)
Article
Accés obertNo necessary and sufficient condition for reachability of switched linear singular systems has been found, exceptuating the case of the so-called “equisingular systems”. Such a condition is not valid in the general case, ... -
Structural controllability and observability of switched linear systems
García Planas, María Isabel; Magret Planas, Maria dels Dolors (2015)
Text en actes de congrés
Accés obertIn the last years, the dynamic control of switched systems have attracted considerable interest, because these systems arise in many engineering fields. Controllability and observability of such systems, which are fundamental ... -
Switched linear systems. Geometric approach
Magret Planas, Maria dels Dolors; Montoro López, María Eulalia (2011-10)
Report de recerca
Accés obertWe consider equivalence relation between switched linear systems and compute the dimension of equivalence classes, after proving they can be obtained as the orbits of the action of a Lie group on the differentiable manifold ... -
Switched singular linear systems
Clotet Juan, Josep; Ferrer Llop, Josep; Magret Planas, Maria dels Dolors (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06)
Text en actes de congrés
Accés obertWe consider switched singular linear systems and determine the set of reachable/controllable states. We derive necessary and sufficient conditions for such a system to be reachable/controllable when an “equisingularity ... -
Switched singular linear systems and reachability
Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2011-10)
Report de recerca
Accés obertWe consider switched singular linear systems and conditions for such a system to be reachable/controllable in the cases where some hypotheses hold. -
Two parametric quasi-cyclic codes as hyperinvariants subspaces
García Planas, María Isabel; Magret Planas, Maria dels Dolors; Montoro López, María Eulalia (2013)
Article
Accés obertIt is known the relationship between cyclic codes and invariant subspaces. In this work we present a general- ization considering “generalized” cyclic codes and hy- perinvariant subspaces -
Upper bounds for the distance between a controllable switched linear system and the set of uncontrollable ones
Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2013-05-28)
Article
Accés oberthe set of controllable switched linear systems is an open and dense set in the space of all switched linear systems. Therefore it makes sense to compute the distance from a controllable system to the nearest uncontrollable ...