Ara es mostren els items 21-35 de 35

    • 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 obert
      Bimodal 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 obert
      It 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 obert
      La 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'editorial
      The 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'editorial
      A 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'editorial
      Abstract 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 obert
      The 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 obert
      No 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 obert
      In 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 obert
      We 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 obert
      We 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 obert
      We 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 obert
      It 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 obert
      he 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 ...