Departament de Matemàtiques

Enviaments recents

  • Structure and enumeration of K4-minor-free links and link diagrams 

    Rué Perna, Juan José; Thilikos Touloupas, Dimitrios; Velona, Vasiliki (2018-07-01)
    Article
    Accés restringit per política de l'editorial
    We study the class L of link-types that admit a K4-minor-free diagram, i.e., they can be projected on the plane so that the resulting graph does not contain any subdivision of K4. We prove that L is the closure of a subclass ...

  • Intersection problem for Droms RAAGs 

    Delgado Rodríguez, Jorge; Ventura Capell, Enric; Zakharov, Alexander (2018-01-01)
    Article
    Accés obert
    We solve the subgroup intersection problem (SIP) for any RAAG G of Droms type (i.e., with defining graph not containing induced squares or paths of length 3): there is an algorithm which, given finite sets of generators ...

  • Design of hybrid multi-actuation schemes for vibration control of adjacent twin structures 

    Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Rodellar Benedé, José (2018)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In this paper, we present a control strategy for the seismic protection of adjacent twin buildings, which combines interbuilding actuation devices with an asymmetrical arrangement of interstory actuators. This kind of ...

  • Note on bouncing backgrounds 

    Haro Cases, Jaume; Pan, Supriya (American Physical Society (APS), 2018-05-15)
    Article
    Accés obert
    The theory of inflation is one of the fundamental and revolutionary developments of modern cosmology that became able to explain many issues of the early Universe in the context of the standard cosmological model (SCM). ...

  • Algebraic description of jacobians isogeneous to certain prym varieties with polarization (1,2) 

    Enolski, Viktor Z.; Fedorov, Yuri (2018-01-01)
    Article
    Accés obert
    For a class of non-hyperelliptic genus 3 curves C which are twofold coverings of elliptic curves E, we give an explicit algebraic description of all birationally nonequivalent genus 2 curves whose Jacobians are degree 2 ...

  • Regularization around a generic codimension one fold-fold singularity 

    Bonet Revés, Carles; Fernandes Larrosa, Juliana; Martínez-Seara Alonso, M. Teresa (2018-09-05)
    Article
    Accés restringit per política de l'editorial
    This paper is devoted to study the generic fold-fold singularity of Filippov systems on the plane, its unfoldings and its Sotomayor–Teixeira regularization. We work with general Filippov systems and provide the bifurcation ...

  • Euclides no vivió en Manhattan: geometría urbana 

    Gómez Urgellés, Joan Vicenç (2018)
    Comunicació de congrés
    Accés obert
    Este artículo es una propuesta para la enseñanza/aprendizaje de algunos elementos de cálculo de matrices a partir del modelado matemático. De hecho, algunas situaciones cotidianas se establecen teniendo también las matrices ...

  • Neighbor-locating colorings in graphs 

    Hernando Martín, María del Carmen; Mora Giné, Mercè; Pelayo Melero, Ignacio Manuel; Alcón, Liliana; Gutierrez, Marisa (2018-06-29)
    Report de recerca
    Accés obert
    A k -coloring of a graph G is a k -partition ¿ = { S 1 ,...,S k } of V ( G ) into independent sets, called colors . A k -coloring is called neighbor-locating if for every pair of vertices u,v belonging to the same color S ...

  • Open problems, questions, and challenges in finite-dimensional integrable systems 

    Miranda Galcerán, Eva; Bolsinov, Alexey; Matveev, Vladimir; Tabachnikov, Sergei (Royal Society, 2018-05-14)
    Article
    Accés obert
    The paper surveys open problems and questions related to different aspects of integrable systems with finitely many degrees of freedom. Many of the open problems were suggested by the participants of the conference ...

  • Equivariant classification of bm-symplectic surfaces 

    Miranda Galcerán, Eva; Planas Bahí, Arnau (Springer, 2018-07-24)
    Article
    Accés obert
    Inspired by Arnold’s classification of local Poisson structures [1] in the plane using the hierarchy of singularities of smooth functions, we consider the problem of global classification of Poisson structures on surfaces. ...

  • Design and experimental implementation of a hysteresis algorithm to optimize the maximum power point extracted from a photovoltaic system 

    Ponce de León Puig, Nubia Ilia; Acho Zuppa, Leonardo; Rodellar Benedé, José (2018-07-17)
    Article
    Accés obert
    In the several last years, numerous Maximum Power Point Tracking (MPPT) methods for photovoltaic (PV) systems have been proposed. An MPPT strategy is necessary to ensure the maximum power efficiency provided to the load ...

  • Norm estimates for the hardy operator in terms of B-p weights 

    Boza Rocho, Santiago; Soria de Diego, Javier (2017-06-01)
    Article
    Accés obert
    We study the explicit dependence of the Bp-constant of the weight, [w]Bp , in the estimates of the norm of the Hardy operator acting on non-increasing functions in L p (w) or L p,8(w).

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