SISSA Open Science

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  • Fonda, Alessandro; Klun, Giuliano (SISSA, 2019-03-07)
    The classical Poincaré–Bohl theorem provides the exis-tence of a zero for a function avoiding external rays. When the do-main is convex, the same holds true when avoiding normal cones. We consider here the possibility of ...
  • Grava, Tamara; Kapaev, Andrei; Klein, Christian (SISSA, 2014-01-15)
    For equation P$_I^2$, the second member in the P$_I$ hierarchy, we prove existence of various degenerate solutions depending on the complex parameter $t$ and evaluate the asymptotics in the complex $x$ plane for $|x|\to\infty$ ...
  • Bonelli, Giulio; Tanzini, Alessandro; Zabzine, Maxim (2005)
    We construct a gauge fixed action for topological membranes on G2-manifolds such that its bosonic part is the standard membrane theory in a particular gauge. We prove that quantum mechanically the path-integral in this ...
  • Yajima, Kenji (SISSA, 2016-06)
    We show that wave operators for three dimensional Schr\"odinger operators H=−Δ+V with threshold singularities are bounded in L1(R3) if and only if zero energy resonances are absent from H and the existence of zero energy ...
  • Giglia, Elena; Bianco, Stefano (2022-05-02)
    Open Science seminar by Dr. Stefano Bianco from INFN on May 2nd 2022. The introduction to the seminar is given by Dr. Elena Giglia from University of Turin.
  • Giglia, Elena (2022-05-03)
    Open Science workshop by Dr. Elena Giglia, Head of the Open Science Unit, from University of Turin. Part I.
  • Bressan, Alberto; Fonte, Massimo (2005)
    In this paper we construct a global, continuous flow of solutions to the Camassa-Holm equation on the entire space H1. Our solutions are conservative, in the sense that the total energy int[(u2 + u2x) dx] remains a.e. ...
  • Alouges, Francois; DeSimone, Antonio; Heltai, Luca; Lefebvre, Aline; Merlet, Benoit (2010-07-29)
    We study self propelled stokesian robots composed of assemblies of balls, in dimen- sions 2 and 3, and prove that they are able to control their position and orientation. This is a result of controllability, and its proof ...
  • Wulzer, Andrea (2005)
    A very general class of resolved versions of the C/ZN, T 2/ZN and S1/Z2 orbifolds is considered and the free theory of 6D chiral fermions studied on it. As the orbifold limit is taken, localized 4D chiral massless fermions ...
  • Zhao Jian (SISSA, 2011-11-30)
    We study the nonabelian vortex counting problem on $\mathbb{C}/\mathbb{Z}_p$. At first we calculate vortex partition functions on the orbifold space using localization techniques, then we find how to extract orbifold vortex ...
  • Kobayashi, Takeshi; Perri, Daniele (2023-04-11)
    We present new bounds on the cosmic abundance of magnetic monopoles based on the survival of primordial magnetic fields during the reheating and radiation-dominated epochs. The new bounds can be stronger than the ...
  • Delfino, Gesualdo (2007-05-15)
    The scaling limit of the two-dimensional Ising model in the plane of temperature and magnetic field defines a field theory which provides the simplest illustration of non-trivial phenomena such as spontaneous symmetry ...
  • Fonda, Alessandro; Sfecci, Andrea (SISSA, 2012-04)
    We prove the existence of a periodic solution to a nonlinear impact oscillator, whose restoring force has an asymptotically linear behavior. To this aim, after regularizing the problem, we use phase-plane analysis, and ...
  • Baldi, Pietro (2007-03-01)
    We consider Kirchhoff equations for vibrating strings and elastic membranes under the action of an external forcing of period 2pi / omega and small amplitude epsilon. We prove existence, regularity and local uniqueness of ...
  • Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea (2019-09-12)
    We prove the existence of periodic solutions of some infinite-dimensional nearly integrable Hamiltonian systems, bifurcating from infinite-dimensional tori, by the use of a generalization of the Poincaré–Birkhoff Theorem.
  • Fonda, Alessandro; Klun, Giuliano; Sfecci, Andrea (SISSA, 2020-05)
    We prove the existence of periodic solutions of some infinite-dimensional systems by the use of the lower/upper solutions method. Both the well-ordered and non-well-ordered cases are treated, thus generalizing to systems ...
  • Fonda, Alessandro; Gidoni, Paolo (2013-06-11)
    We provide a necessary and sufficient condition for permanence related to a local dynamical system on a suitable topological space. We then present an illustrative application to a Lotka–Volterra predator–prey ...
  • Kanemura, Shinya; Matsuda, Koichi; Ota, Toshihiko; Shindou, Tetsuo; Takasugi, Eiichi; Tsumura, Koji (2005)
    We examine contributions from Majorana phases to lepton flavor violating processes in the framework of the minimal supersymmetric standard model with heavy right-handed neutrinos. All phases in the complex neutrino Yukawa ...

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