Exploració per tema "GRAPHS"

Ara es mostren els items 1-3 de 3

    • Degree and algebraic properties of lattice and matrix ideals 

      O'Carroll, Liam; Planas Vilanova, Francesc d'Assís; Villarreal Rodríguez, Rafael Heraclio (2014-01-01)
      Article
      Accés obert
      We study the degree of nonhomogeneous lattice ideals over arbitrary fields, and give formulas to compute the degree in terms of the torsion of certain factor groups of Z(s) and in terms of relative volumes of lattice ...

    • On the local spectra of the subconstituents of a vertex set and completely pseudo-regular codes 

      Cámara Vallejo, Marc; Fàbrega Canudas, José; Fiol Mora, Miquel Àngel; Garriga Valle, Ernest (2014-10-30)
      Article
      Accés restringit per política de l'editorial
      In this paper we study the relation between the local spectrum of a vertex set C and the local spectra of its subconstituents. In particular, it is shown that, when C is a completely regular code, such spectra are uniquely ...

    • Some results on the structure of multipoles in the study of snarks 

      Fiol Mora, Miquel Àngel; Vilaltella Castanyer, Joan (2015-02-25)
      Article
      Accés obert
      Multipoles are the pieces we obtain by cutting some edges of a cubic graph in one or more points. As a result of the cut, a multipole M has vertices attached to a dangling edge with one free end, and isolated edges with ...