Recent Submissions

  • Lie symmetries of nonrelativistic and relativistic motions 

    Batlle Arnau, Carles; Gomis Torné, Joaquin; Ray, Sourya; Zanelli, Jorge (American Physical Society (APS), 2019-03-15)
    Article
    Open Access
    We study the Lie symmetries of non-relativistic and relativistic higher order constant motions in d spatial dimensions, i.e. constant acceleration, constant rate-of-change -of-acceleration (constant jerk), and so on. In ...
  • On the k-independence number of graphs 

    Abiad, Aida; Coutinho, Gabriel; Fiol Mora, Miquel Àngel (2019)
    Article
    Restricted access - publisher's policy
    This paper generalizes and unifies the existing spectral bounds on the k-independence number of a graph, which is the maximum size of a set of vertices at pairwise distance greater than k. The previous bounds known in the ...
  • Locating domination in bipartite graphs and their complements 

    Hernando Martín, María del Carmen; Mora Giné, Mercè; Pelayo Melero, Ignacio Manuel (2018-01-01)
    Article
    Restricted access - publisher's policy
  • Different reheating mechanisms in quintessence inflation 

    Haro Cases, Jaume (American Physical Society (APS), 2019-02-11)
    Article
    Open Access
    Different well-known ways to reheat the Universe, such as instant preheating, the creation of particles nearly or conformally coupled with gravity, or from the decay of products of a curvaton field, are revisited and ...
  • Resistance distances in extended or contracted networks 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (Elsevier, 2018-02-01)
    Article
    Open Access
  • Effect of public transport strikes on air pollution levels in Barcelona (Spain) 

    Basagaña Flores, Xavier; Triguero-Mas, Margarita; Agis Cherta, David; Perez, Noemi; Reche, Cristina; Alastuey, Andres; Querol, Xavier (Elsevier, 2018)
    Article
    Restricted access - publisher's policy
    Public transport strikes can lead to an increase of the number of private vehicle trips, which in turn can increase air pollution levels. We aimed to estimate the change in air pollution concentrations during public transport ...
  • Exploring conditions and usefulness of UAVs in the BRAIN Massive Inspections Protocol 

    Serrat Piè, Carles; Cellmer, Anna; Banaszek, Anna; Gibert Armengol, Vicente (2019-01-01)
    Article
    Open Access
    In this paper authors conduct a case study analysis by implementing the use of UAVs in the data collection within the BRAIN framework for the failures diagnosis of facades. The main goal is to assess the conditions and ...
  • D-stratification and hierarchy graphs of the space of order 2 and 3 matrix pencils 

    García Planas, María Isabel; Magret Planas, Maria dels Dolors (Universal Journal of Mathematics and Applications, 2019)
    Article
    Open Access
    Small changes in the entries of a matrix pencil may lead to important changes in its Kronecker normal form. Studies about the effect of small perturbations have been made when considering the stratification associated with ...
  • A Koszul complex over skew polynomial rings 

    Álvarez Montaner, Josep; Boix, Alberto F.; Zarzuela Armengou, Santiago (2019-01-01)
    Article
    Restricted access - publisher's policy
    We construct a Koszul complex in the category of left skew polynomial rings associated with a flat endomorphism that provides a finite free resolution of an ideal generated by a Koszul regular sequence
  • Coupling symmetries with Poisson structures 

    Miranda Galcerán, Eva; Laurent Gengoux, Camille (Springer, 2013)
    Article
    Restricted access - publisher's policy
    We study local normal forms for completely integrable systems on Poisson manifolds in the presence of additional symmetries. The symmetries that we consider are encoded in actions of compact Lie groups. The existence of ...
  • Secret sharing schemes for (k, n)-consecutive access structures 

    Herranz Sotoca, Javier; Sáez Moreno, Germán (Springer, 2018-09-01)
    Article
    Restricted access - publisher's policy
    We consider access structures over a set P of n participants, defined by a parameter k with 1 = k = n in the following way: a subset is authorized if it contains participants i, i + 1,...,i + k - 1, for some i ¿ {1,...,n-k+1}. ...
  • The clay public lecture and conference on the Poincaré Conjecture, Paris, 7-9 June 2010 

    Miranda Galcerán, Eva (2010-09)
    Article
    Open Access

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