SISSA Open Science

Browsing SISSA Preprints by Title

Browsing SISSA Preprints by Title

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  • An asymptotic description of Noether-Lefschetz components in toric varieties 
    Bruzzo, Ugo; Montoya, William D. (SISSA, 2019-03-19)
    We extend the definition of Noether-Leschetz components to quasi-smooth hyper- surfaces in a projective toric variety PΣ2k+1 having orbifold singularities, and prove that asymptoticaly the components whose codimension is ...
  • Attainment results for nematic elastomers 
    Agostiniani, Virginia; Dal Maso, Gianni; DeSimone, Antonio (SISSA, 2013-10-10)
    We consider a class of non-quasiconvex frame indifferent energy densities which includes Ogden-type energy densities for nematic elastomers. For the corresponding geometrically linear problem we provide an explicit minimizer ...
  • Automorphisms of numerical Godeaux surfaces with torsion of order 3, 4, or 5 
    Maggiolo, Stefano (2010-02-18)
    We compute the automorphisms groups of all numerical Godeaux surfaces, i.e. minimal smooth surfaces of general type with K^2 = 1 and p_g = 0, with torsion of the Picard group of order \nu equals 3, 4, or 5. We present ...
  • Aziendalismo universale? Linguaggio economico e descrizioni della realtà 
    Magris, Claudio; Finzi, Roberto; Alvi, Geminello; Beccaria, Gian Luigi; Gilibert, Giorgio; Romiti, Cesare; Desiata, Alfonso; Virasoro, Miguel; Pagano, Maurizio; Zanetti, Michele; Dorigo, Elettra; Carli, Augusto; Codega, Franco; Pontiggia, Giuseppe (2005-05-16)
    Questo preprint riproduce gli interventi tenuti al convegno svoltosi il 18 febbraio 2000 presso la SISSA. Oltre ai contributi qui stampati, ha tenuto una relazione Livio Cossar. Inoltre c'è stata anche un'ampia discussione, ...
  • Backreacting Flavors in the Klebanov-Strassler Background 
    Benini, Francesco; Canoura, Felipe; Cremonesi, Stefano; Nunez, Carlos; Ramallo, Alfonso V. (2007-09-17)
    n this paper we present new analytic solutions of pure Type IIB supergravity plus D7-branes describing the addition of an arbitrary number of flavors to the Klebanov-Tseytlin and Klebanov-Strassler backgrounds. We provide ...
  • The beat of a fuzzy drum: fuzzy Bessel functions for the disc 
    Lizzi, Fedele; Vitale, Patrizia; Zampini, Alessandro (2005)
    The fuzzy disc is a matrix approximation of the functions on a disc which preserves rotational symmetry. In this paper we introduce a basis for the algebra of functions on the fuzzy disc in terms of the eigenfunctions of ...
  • Benchmarking the Immersed Finite Element Method for Fluid-Structure Interaction Problems 
    Heltai, Luca; Costanzo, Francesco; Roy, Saswati (SISSA, 2013-06-05)
    We present an implementation of a fully variational formulation of an immersed methods for fluid-structure interaction problems based on the finite element method. While typical implementation of immersed methods ...
  • Beyond Amplitudes' Positivity and the Fate of Massive Gravity 
    Bellazzini, Brando; Riva, Francesco; Serra, Javi; Sgarlata, Francesco (2017)
    We constrain effective feld theories by going beyond the familiar positivity bounds that follow from unitarity, analyticity, and crossing symmetry of the scattering amplitudes. As interesting examples, we discuss the ...
  • Black Holes, Instanton Counting on Toric Singularities and q-Deformed Two-Dimensional Yang-Mills Theory 
    Griguolo, Luca; Seminara, Domenico; Szabo, Richard J.; Tanzini, Alessandro (2006-11-09)
    We study the relationship between instanton counting in N=4 Yang-Mills theory on a generic four-dimensional toric orbifold and the semi-classical expansion of q-deformed Yang-Mills theory on the blowups of the minimal ...
  • Born approximation in the problem of the rigorous derivation of the Gross-Pitaevskii equation 
    Michelangeli, Alessandro (2006-04-18)
    "It has a flavour of Mathematical Physics..."With these words, just few years ago, prof. Di Giacomo used to introduce the topic of the Born approximation within a nonrelativistic potential theory, in his `oversize' course ...
  • Bose-Einstein condensation: analysis of problems and rigorous results 
    Michelangeli, Alessandro (2007-10-08)
  • BPS Partition Functions for Quiver Gauge Theories: Counting Fermionic Operators 
    Forcella, Davide (2007-05-31)
    We discuss a general procedure to obtain 1/2 BPS partition functions for generic N = 1 quiver gauge theories. These functions count the gauge invari- ant operators (bosonic and fermionic), charged under all the global ...
  • Brane world effective actions for D-branes with fluxes 
    Bertolini, Matteo; Billó, Marco; Lerda, Alberto; Morales, Jose F.; Russo, Rodolfo (2005)
    We develop systematic string techniques to study brane world effective actions for models with magnetized (or equivalently intersecting) D-branes. In particular, we derive the dependence on all NS-NS moduli of the kinetic ...
  • A bridging mechanism in the homogenisation of brittle composites with soft inclusions 
    Barchiesi, Marco; Lazzaroni, Giuliano; Zeppieri, Caterina Ida (SISSA, 2015)
    We provide a homogenisation result for the energy-functional associated with a purely brittle composite whose microstructure is characterised by soft periodic inclusions embedded in a stiffer matrix. We show that the two ...
  • Bubbles with prescribed mean curvature: the variational approach 
    Caldiroli, Paolo; Musina, Roberta (2009-07-08)
  • Bubbling AdS and Vacuum String Field Theory 
    Bonora, Loriano; Maccaferri, Carlo; Scherer Santos, Ricardo Jose; Tolla, Driba Demissie (2006-04-12)
    We show that a family of 1/2--BPS states of $\N=4$ SYM is in correspondence with a family of classical solutions of VSFT with a $B$--field playing the role of the inverse Planck constant. We show this correspondence by ...
  • BV instability for the Lax-Friedrichs scheme 
    Baiti, Paolo; Bressan, Alberto; Jenssen, Helge Kristian (2007-11-05)
    It is proved that discrete shock profiles (DSPs) for the Lax-Friedrichs scheme for a system of conservation laws do not necessarily depend continuously in BV on their speed. We construct examples of $2 \times 2$-systems ...
  • Can we learn something more on oscillations from atmospheric neutrinos? 
    Schwetz, Thomas (2006-11-09)
    We show that for long-baseline experiments using a Mt water Cerenkov detector atmospheric neutrino data provide a powerful method to resolve parameter degeneracies. In particular, the combination of long-baseline and ...
  • Canonical and pertubative quantum gravity 
    Esposito, Giampiero (1993)
    After a review of Dirac's theory of iconstrained Hamiltonian systems and their quantization, canonical quantum gravity is studied relying on the Arnowitt-Deser-Misner formalism. First-class constraints of the theory ...
  • A Canonical Frame for Nonholonomic Rank Two Distributions of Maximal Class 
    Doubrov, Boris; Zelenko, Igor (2005)
    In 1910 E. Cartan constructed the canonical frame and found the most symmetric case for maximally nonholonomic rank 2 distributions in R5. We solve the analogous problems for rank 2 distributions in Rn for arbitrary n > ...

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