Results for "Francesca Gardini"

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The nonconforming virtual element method for eigenvalue problemsFeb 08 2018We analyse the nonconforming Virtual Element Method (VEM) for the approximation of elliptic eigenvalue problems. The nonconforming VEM allow to treat in the same formulation the two- and three-dimensional case.We present two possible formulations of the ... More
Virtual Element Method for Second Order Elliptic Eigenvalue ProblemsOct 12 2016Oct 13 2016We introduce the Virtual Element Method (VEM) for elliptic eigenvalue problems. The main result of the paper states that VEM provides an optimal order approximation of the eigenmodes. A wide set of numerical tests confirm the theoretical analysis.
Viral Search algorithmJun 14 2016The article, after a brief introduction on genetic algorithms and their functioning, presents a kind of genetic algorithm called Viral Search. We present the key concepts, we formally derive the algorithm and we perform numerical tests designed to illustrate ... More
Optimal convergence of adaptive FEM for eigenvalue clusters in mixed formApr 24 2015It is shown that the h-adaptive mixed finite element method for the discretization of eigenvalue clusters of the Laplace operator produces optimal convergence rates in terms of nonlinear approximation classes. The results are valid for the typical mixed ... More
A posteriori error analysis for nonconforming approximation of multiple eigenvaluesApr 22 2014Nov 10 2014In this paper we study an a posteriori error indicator introduced in E. Dari, R.G. Duran, C. Padra, Appl. Numer. Math., 2012, for the approximation of the Laplace eigenvalue problem with Crouzeix-Raviart non-conforming finite elements. In particular, ... More
Limber equation for luminosity dependent correlationsNov 11 1999The passage from angular to spatial correlations, in the case of spatial clustering length depending on the average distance between nearby objects is studied. We show that, in a number of cases, the scaling law of angular correlation amplitudes, which ... More
Infinities as a measure of our ignoranceMay 10 2013The quantization of gravity offers a solution to the presence of singularities in cosmology. Infinities are removed because of the existence of finite quanta of spacetime. This is one of the most important prediction of Loop Quantum Gravity. But treating ... More
General covariant transition amplitudes in quantum cosmologyOct 13 2011The path-integral approach to cosmology consists in the computation of transition amplitudes between states of the quantum geometry of the universe. In the past, the concrete computation of these transitions amplitudes has been performed in a perturbative ... More
Spinfoam Cosmology: quantum cosmology from the full theoryNov 21 2010Quantum cosmology is usually studied quantizing symmetry-reduced variables. Is it possible, instead, to define quantum cosmology starting from the full quantum gravity theory? In Loop Quantum Gravity (LQG), it is possible to cut the degrees of freedom ... More
Consequences of the functional equation of the $p$-adic $L$-function of an elliptic curveNov 09 2016We prove that the first two coefficients in the series expansion around $s=1$ of the $p$-adic $L$-function of an elliptic curve over $\mathbb{Q}$ are related by a formula involving the conductor of the curve. This is analogous to a recent result of Wuthrich ... More
Symmetries of quadratic forms classes and of quadratic surds continued fractions. Part I: A Poincaré model for the de Sitter worldAug 11 2007Mar 27 2008The problem of the classification of the indefinite binary quadratic forms with integer coefficients is solved introducing a special partition of the de Sitter world, where the coefficients of the forms lie, into separate domains. Every class of indefinite ... More
A pilot study on the daily control capability of s-EMG prosthetic hands by amputeesNov 18 2015Nov 24 2015Surface electromyography is a valid tool to gather muscular contraction signals from intact and amputated subjects. Electromyographic signals can be used to control prosthetic devices in a noninvasive way distinguishing the movements performed by the ... More
Separation of branches of O(N-1)-invariant solutions for a semilinear elliptic equationFeb 17 2016We consider a semilinear elliptic problem in an annulus of R^N, with N>1. Recent results ensure that there exists a sequence p_k of exponents of the nonlinear term at which a nonradial bifurcation from the radial solution occurs. Exploiting the properties ... More
Many-nodes/many-links spinfoam: the homogeneous and isotropic caseJul 13 2011Oct 13 2011I compute the Lorentzian EPRL/FK/KKL spinfoam vertex amplitude for regular graphs, with an arbitrary number of links and nodes, and coherent states peaked on a homogeneous and isotropic geometry. This form of the amplitude can be applied for example to ... More
Relational Quantum CosmologyAug 22 2015The application of quantum theory to cosmology raises a number of conceptual questions, such as the role of the quantum-mechanical notion of "observer" or the absence of a time variable in the Wheeler-DeWitt equation. I point out that a relational formulation ... More
New invariants of links from a skein invariant of colored linksDec 02 2015Dec 10 2015New invariants of links are constructed using the skein invariant polynomial of colored links defined by the author in [1]. These invariants are stronger than the homflypt polynomial.
Bell-shaped nonstationary refinable rippletsJan 15 2015We study the approximation properties of the class of nonstationary refinable ripplets introduced in \cite{GP08}. These functions are solution of an infinite set of nonstationary refinable equations and are defined through sequences of scaling masks that ... More
On the spectrum of the Laplace-Beltrami operator for p-forms on asymptotically hyperbolic manifoldsNov 07 2003Under suitable conditions on the asymptotic decay of the metric, we compute the essential spectrum of the Laplace-Beltrami operator acting on $p$-forms on asymptotically hyperbolic manifolds.
A $p$-Laplacian Neumann problem with a possibly supercritical nonlinearityOct 15 2016We look for nonconstant, positive, radially nondecreasing solutions of the quasilinear equation $-\Delta_p u+u^{p-1}=f(u)$ with $p>2$, in the unit ball $B$ of $\mathbb R^N$, subject to homogeneous Neumann boundary conditions. The assumptions on the nonlinearity ... More
Rational tangles and the modular groupAug 15 2009There is a natural way to associate with a transformation of an isotopy class of rational tangles to another, an element of the modular group. The correspondence between the isotopy classes of rational tangles and rational numbers follows, as well as ... More
Macroscopic limit of a bipartite Curie-Weiss model: a dynamical approachJun 16 2014Aug 25 2014We analyze the Glauber dynamics for a bi-populated Curie-Weiss model. We obtain the limiting behavior of the empirical averages in the limit of infinitely many particles. We then characterize the phase space of the model in absence of magnetic field and ... More
Cesaro averages of Euler-like functionsJun 08 2008By Euler-like function we mean a function defined on the positive integers and associating to $n$ the product, over all primes $p$ dividing $n$, of 1 plus (or minus) the inverse of $p$ to the power $s$. We calculate the limit of the Cesaro mean of these ... More
Theta functions on the moduli space of parabolic bundlesFeb 18 2003Let X be a smooth projective connected curve of genus $g \ge 2$ and let I be a finite set of points of X. Fix a parabolic structure on I for rank r vector bundles on X. Let $M^{par}$ denote the moduli space of parabolic semistable bundles and let $L^{par}$ ... More
Gysin exact sequences for quantum weighted lens spacesOct 04 2016We describe quantum weighted lens spaces as total spaces of quantum principal circle bundles, using a Cuntz-Pimsner model. The corresponding Pimsner exact sequence is interpreted as a noncommutative analogue of the Gysin exact sequence. We use the sequence ... More
Can three-neutron forces be constrained by empirical information on the neutron skin of 48Ca and 208Pb?Jun 12 2016We calculate the neutron matter equation of state from two-neutron forces up to fifth order of the chiral expansion and investigate the order-by-order convergence of the predictions. Based on these equations of state, we derive the binding energies and ... More
Symmetries of quadratic forms classes and of quadratic surds continued fractions. Part II: Classification of the periods' palindromesAug 15 2007Mar 27 2008The continue fractions of quadratic surds are periodic, according to a theorem by Lagrange. Their periods may have differing types of symmetries. This work relates these types of symmetries to the symmetries of the classes of the corresponding indefinite ... More
On Squares in Lucas SequencesSep 02 2013In this short paper, we prove, by only using elementary tools, general cases when $U_n(P,Q) \neq \square$, where $U_n(P,Q)$ is the Lucas sequence of the first type.
Sphere systems, standard form, and cores of products of treesOct 26 2016We introduce the concept of a standard form for two embedded maximal sphere systems in the doubled handlebody, and we prove an existence and uniqueness result. In particular, we show that pairs of maximal sphere systems in the doubled handlebody (up to ... More
On the spectrum of the Laplace-Beltrami operator for $p$-forms for a class of warped product metricsNov 12 2003We explicitely compute the essential spectrum of the Laplace-Beltrami operator for $p$-forms for the class of warped product metrics $d\sigma^2= y^{2a}dy^2 + y^{2b}d\theta_{\partial M}^2$, where $y$ is a boundary defining function on a compact manifold ... More
Stationary layered solutions for a system of Allen-Cahn type equationsNov 25 2012Dec 03 2012We consider a class of semilinear elliptic system of the form $-\Delta u(x,y)+\nabla W(u(x,y))=0,\quad (x,y)\in\R^{2}$ where $W:\R^{2}\to\R$ is a double well non negative symmetric potential. We show, via variational methods, that if the set of solutions ... More
Matricial formulae for partitionsJun 07 2008The exponential of the triangular matrix whose entries in the diagonal at distance $n$ from the principal diagonal are all equal to the sum of the inverse of the divisors of $n$ is the triangular matrix whose entries in the diagonal at distance $n$ from ... More
Periodic configurations of subshifts on groupsFeb 14 2014We study the density of periodic configurations for shift spaces defined on (the Cayley graph of) a finitely generated group. We prove that in the case of a full shift on a residually finite group and in that of a group shift space on an abelian group, ... More
Atomism and Relationalism as guiding principles for Quantum GravitySep 05 2013The research in quantum gravity has jauntily grown in the recent years, intersecting with conceptual and philosophical issues that have a long history. In this paper I analyze the conceptual basis on which Loop Quantum Gravity has grown, the way it deals ... More
An invariant of colored links via skein relationAug 28 2015Dec 02 2015In this note we define a polynomial invariant for colored links by a skein relation. It specializes to the Jones polynomial for classical links.
Projective geometry from Poisson algebrasDec 08 2009Dec 09 2010In analogy with the Poisson algebra of the quadratic forms on the symplectic plane, and the notion of duality in the projective plane introduced by Arnold in \cite{Arn}, where the concurrence of the triangle altitudes is deduced from the Jacobi identity, ... More
An application of scattering theory to the spectrum of the Laplace-Beltrami operatorJan 10 2003Applying a theorem due to Belopol'ski and Birman, we show that the Laplace-Beltrami operator on 1-forms on ${\bf R}^n$ endowed with an asymptotically Euclidean metric has absolutely continuous spectrum equal to $[0, +\infty)$.
Scattering theory for p-forms on hyperbolic real spaceJan 25 2001Due to spectral obstructions, a scattering theory in the Lax-Phillips sense for the wave equation for differential p-forms on H^{n+1} cannot be developed. As a consequence, Huygens' principle for the wave equation in this context does not hold. If we ... More
Hydropower optimization: an industrial approachOct 31 2016Nowadays hydroelectric energy is one of the best energy sources: it is cleaner, safer and more programmable than other sources. For this reason, its manage could not be done in an approssimative way, but advance mathematical models must be use. In this ... More
Remarks on the paper "Non-existence of Shilnikov chaos in continuous-time systems"Apr 05 2014The present note refers to a result proposed in [Elhadj and Sprott, 2012], and shows that the Theorem therein is not correct. We explain that a proof of that Theorem cannot be given, as the statement is not correct, and we underline a mistake occurring ... More
Polynomial Diffusion Models for Life Insurance LiabilitiesFeb 25 2016Sep 23 2016In this paper we study the pricing and hedging problem of a portfolio of life insurance products under the benchmark approach, where the reference market is modelled as driven by a state variable following a polynomial diffusion on a compact state space. ... More
Defining Relations of Noncommutative Trace Algebra of Two $3 \times 3$ MatricesJan 14 2005The noncommutative (or mixed) trace algebra $T_{nd}$ is generated by $d$ generic $n\times n$ matrices and by the algebra $C_{nd}$ generated by all traces of products of generic matrices, $n,d\geq 2$. It is known that over a field of characteristic 0 this ... More
A high regularity result of solutions to modified p-Stokes equationsAug 05 2013This paper is concerned with a special elliptic system, which can be seen as a perturbed $p$-Laplacean system, $p\in(1,2)$, and, for its "shape", it is close to the $p$-Stokes system. Since our "stress tensor" is given by means of $\nabla u $ and not ... More
Higher regularity of solutions to the singular $p$-Laplacean systemSep 10 2012Nov 20 2012This paper has been withdrawn by the authors due to a mistake in the proof of the chief result. In particular Theorem 1.3 is correct, while Theorem 1.1 and Theorem 1.2 hold with \mu>0 and a suitable restriction on the exponent p. The proof of the modified ... More
Minimum-time strong optimality of a singular arc: the multi-input non involutive caseApr 29 2014We consider the minimum-time problem for a multi-input control-affine system, where we assume that the controlled vector fields generate a non-involutive distribution of constant dimension, and where we do not assume a-priori bounds for the controls. ... More
Integrally closed rings in birational extensions of two-dimensional regular local ringsNov 26 2012Let $D$ be an integrally closed local Noetherian domain of Krull dimension 2, and let $f$ be a nonzero element of $D$ such that $fD$ has prime radical. We consider when an integrally closed ring $H$ between $D$ and $D_f$ is determined locally by finitely ... More
Women in Italian astronomyFeb 09 2014This document gives some quantitative facts about the role of women in Italian astronomy. More than 26% of Italian IAU members are women: this is the largest fraction among the world leading countries in astronomy. Most of this high fraction is due to ... More
The Evolution of 3He, 4He and D in the GalaxyApr 04 2000Apr 17 2000In this work we present the predictions of a modified version of the ``two-infall model'' (Chiappini et al. 1997) for the evolution of 3He, 4He and D in the solar vicinity, as well as their distributions along the Galactic disk. In particular, we show ... More
Directed Percolation and Generalized Friendly WalkersFeb 10 1999We show that the problem of directed percolation on an arbitrary lattice is equivalent to the problem of m directed random walkers with rather general attractive interactions, when suitably continued to m=0. In 1+1 dimensions, this is dual to a model ... More
On the Construction of Quintessential Inflation ModelsAug 05 1999Oct 05 1999Attention has been recently drawn towards models in which inflation and quintessence schemes are unified. In such `quintessential inflation' models, a unique scalar field is required to play both the role of the inflaton and of the late-time dynamical ... More
Projecting light beams with 3D waveguide arraysAug 29 2016Free-space light beams with complex intensity patterns, or non-trivial phase structure, are demanded in diverse fields, ranging from classical and quantum optical communications, to manipulation and imaging of microparticles and cells. Static or dynamic ... More
A path-integral representation of the free one-flavour staggered-fermion determinantNov 22 2004Lattice fermion actions are constructed with path integrals which are equivalent to the free one-flavour staggered fermion determinant. The Dirac operators used are local and have an identical spectrum of states to the staggered theory. Operators obeying ... More
Reflexivity in Derived CategoriesMay 17 2007May 20 2009An adjoint pair of contravariant functors between abelian categories can be extended to the adjoint pair of their derived functors in the associated derived categories. We describe the reflexive complexes and interpret the achieved results in terms of ... More
An estimate for the entropy of Hamiltonian flowsFeb 28 2006In the paper we present a generalization to Hamiltonian flows on symplectic manifolds of the estimate proved by Ballmann and Wojtkovski in \cite{BaWoEnGeo} for the dynamical entropy of the geodesic flow on a compact Riemannian manifold of nonpositive ... More
Evolution of gossip-based indirect reciprocity on a bipartite networkJun 06 2016Oct 10 2016Cooperation can be supported by indirect reciprocity via reputation.Thanks to gossip, reputations are built and circulated and humans can identify defectors and ostracise them. However, the evolutionary stability of gossip is allegedly undermined by the ... More
Properties of ABA+ for Non-Monotonic ReasoningMar 29 2016We investigate properties of ABA+, a formalism that extends the well studied structured argumentation formalism Assumption-Based Argumentation (ABA) with a preference handling mechanism. In particular, we establish desirable properties that ABA+ semantics ... More
Exotic singularities and spatially curved Loop Quantum CosmologyDec 06 2010We investigate the occurrence of various exotic spacelike singularities in the past and the future evolution of $k = \pm 1$ Friedmann-Robertson-Walker model and loop quantum cosmology using a sufficiently general phenomenological model for the equation ... More
Measurement of azimuthal asymmetries of the unpolarized cross section at HERMESJan 16 2009A multi-dimensional (x, y, z, P_{h\perp}) extraction of cos\phi_h and cos2\phi_h azimuthal asymmetries of unpolarized Semi-Inclusive Deep Inelastic Scattering at HERMES is discussed. The use of data taken with hydrogen and deuterium targets and the separation ... More
Regularity of boundary traces for a fluid-solid interaction modelDec 22 2009We consider a mathematical model for the interactions of an elastic body fully immersed in a viscous, incompressible fluid. The corresponding composite PDE system comprises a linearized Navier-Stokes system and a dynamic system of elasticity; the coupling ... More
Finite dimensional attractor for a composite system of wave/plate equations with localised dampingDec 30 2009Jan 27 2010The long-term behaviour of solutions to a model for acoustic-structure interactions is addressed; the system is comprised of coupled semilinear wave (3D) and plate equations with nonlinear damping and critical sources. The questions of interest are: existence ... More
Long-time dynamics of a coupled system of nonlinear wave and thermoelastic plate equationsJun 27 2008We prove the existence of a compact, finite dimensional, global attractor for a coupled PDE system comprising a nonlinearly damped semilinear wave equation and a nonlinear system of thermoelastic plate equations, without any mechanical (viscous or structural) ... More
Intrinsically-generated fluctuating activity in excitatory-inhibitory networksMay 13 2016Recurrent networks of non-linear units display a variety of dynamical regimes depending on the structure of their synaptic connectivity. A particularly remarkable phenomenon is the appearance of strongly fluctuating, chaotic activity in networks of deterministic, ... More
Finiteness of rank invariants of multidimensional persistent homology groupsJan 03 2010Rank invariants are a parametrized version of Betti numbers of a space multi-filtered by a continuous vector-valued function. In this note we give a sufficient condition for their finiteness. This condition is sharp for spaces embeddable in R^n.
Defining Relations of Minimal Degree of the Trace Algebra of $3 \times 3$ MatricesJan 22 2007The trace algebra C(n,d) over a field of characteristic 0 is generated by all traces of products of d generic nxn matrices, n,d>1. Minimal sets of generators of C(n,d) are known for n=2 and n=3 for any d as well as for n=4 and n=5 and d=2. The defining ... More
Markov trace on the algebra of braids and tiesAug 25 2014Apr 24 2016We prove that the so-called t algebra of braids and ties supports a Markov trace. Further, by using this trace in the Jones' recipe, we define invariant polynomials for classical knots and singular knots. Our invariants have three parameters. The invariant ... More
Fano Kaleidoscopes and their generalizationsJan 08 2018In this work we introduce Fano Kaleidoscopes, Hesse Kaleidoscopes and their generalizations. These are a particular kind of colored designs for which we will discuss general theory, present some constructions and prove existence results. In particular, ... More
Simulating Chandra observations of galaxy clustersOct 29 2003Numerical hydro-N-body simulations are very important tools for making theoretical predictions for the formation of galaxy clusters. They show that the atmospheres of clusters of galaxies have quite complex angular and thermal structures. The full understanding ... More
Gossip quantity and network structure can counterbalance errors in transmission and promote the evolution of cooperationJun 06 2016There are several mechanisms in human societies that help supporting cooperation. Gossiping, for instance, allows to identify defectors who can then be punished via ostracism. However, the evolutionary stability of gossip might be undermined by the fact ... More
Sub-parsec radio cores in nearby Seyfert galaxiesApr 02 2013We present a census of sub-pc scale properties of the VLBI cores in a complete sample of local Seyfert galaxies. Seventeen out of 23 sources with a VLA detection are detected also with VLBI at 1.7 GHz and/or 5 GHz, with an average monochromatic radio ... More
Compact phase space, cosmological constant, discrete timeFeb 01 2015Feb 04 2015We study the quantization of geometry in the presence of a cosmological constant, using a discretiza- tion with constant-curvature simplices. Phase space turns out to be compact and the Hilbert space finite dimensional for each link. Not only the intrinsic, ... More
Planck starsJan 25 2014Feb 08 2014A star that collapses gravitationally can reach a further stage of its life, where quantum-gravitational pressure counteracts weight. The duration of this stage is very short in the star proper time, yielding a bounce, but extremely long seen from the ... More
Cosmological evolution of Alpha driven by a general coupling with QuintessenceJan 24 2005May 18 2005A general model for the cosmological evolution of the fine structure constant \alpha driven by a typical Quintessence scenario is presented. We consider a coupling between the Quintessence scalar \phi and the electromagnetic kinetic term F^2, given by ... More
Cosmic axion background propagation in galaxiesJun 17 2015Jan 23 2016Many extensions of the Standard Model include axions or axion-like particles (ALPs). Here we study ALP to photon conversion in the magnetic field of the Milky Way and starburst galaxies. By modelling the effects of the coherent and random magnetic fields, ... More
A possible solution of the G-dwarf problem in the frame-work of closed models with a time-dependent IMFJul 01 1999In this paper we present a method to solve the G-dwarf problem in the frame-work of analytical models (based on the instantaneous recycling approximation, IRA). We consider a one-zone closed model without inflows or outflows. We suppose a time-dependent ... More
Gluino Contribution to Radiative B Decays: New Operators, Organization of QCD Corrections and Leading Order ResultsApr 04 2001The gluino-induced contribution to the decay $b \to s \gamma$ is investigated in supersymmetric frameworks with generic sources of flavour violation. It is emphasized that the operator basis of the standard model effective Hamiltonian is enlarged and ... More
On the Maximum Entropy Property of the First-Order Stable Spline Kernel and its ImplicationsJun 22 2014Sep 21 2014A new nonparametric approach for system identification has been recently proposed where the impulse response is seen as the realization of a zero--mean Gaussian process whose covariance, the so--called stable spline kernel, guarantees that the impulse ... More
Uniqueness of ground states for a class of quasi-linear elliptic equationsJul 31 2011Sep 15 2011We prove the uniqueness of positive radial solutions for a class of quasi-linear elliptic problems containing, in particular, the quasi-linear Schrodinger equation.
Saint-Venant's principle in dynamical porous thermoelastic media with memory for heat fluxMay 21 2004In the present paper, we study a linear thermoelastic porous material with a constitutive equation for heat flux with memory. An approximated theory of thermodynamics is presented for this model and a maximal pseudo free energy is determined. We use this ... More
Testing supersymmetry at the LHC through gluon-fusion production of a slepton pairDec 02 2009Renormalizable quartic couplings among new particles are typical of supersymmetric models. Their detection could provide a test for supersymmetry, discriminating it from other extensions of the Standard Model. Quartic couplings among squarks and sleptons, ... More
On the interaction between sharing and linearityOct 02 2007Jul 28 2009In the analysis of logic programs, abstract domains for detecting sharing and linearity information are widely used. Devising abstract unification algorithms for such domains has proved to be rather hard. At the moment, the available algorithms are correct ... More
Probing the sensitivity of the total nucleus-nucleus reaction cross section at intermediate energies to medium effects and isospin asymmetriesMay 27 2011This paper presents reaction cross section predictions. These predictions are the result of a continuous pipeline which originates from a microscopic nuclear interaction. Density parameters and effective nucleon-nucleon cross sections (both involved in ... More
Inductive Logic Programming in Databases: from Datalog to DL+logMar 12 2010In this paper we address an issue that has been brought to the attention of the database community with the advent of the Semantic Web, i.e. the issue of how ontologies (and semantics conveyed by them) can help solving typical database problems, through ... More
Early time perturbations behaviour in scalar field cosmologiesNov 10 1998Feb 17 1999We consider the problem of the initial conditions and behaviour of the perturbations in scalar field cosmology with general potential. We use the general definition of adiabatic and isocurvature conditions to set the appropriate initial values for the ... More
Dark Matter Gravitinos and Baryons via Q-ball decay in the Gauge-Mediated MSSMNov 08 2012We show that late Q-ball decay in the MSSM with gauge-mediated SUSY breaking can provide a natural source of non-thermal NLSPs which subsequently decay to gravitino dark matter without violating nucleosynthesis constraints. To show this, we perform a ... More
The $\ell^\infty$-semi-norm on uniformly finite homologyFeb 04 2015May 29 2015Uniformly finite homology is a coarse homology theory, defined via chains that satisfy a uniform boundedness condition. By construction, uniformly finite homology carries a canonical $\ell^\infty$-semi-norm. We show that, for uniformly discrete spaces ... More
Galactic astroarchaeology: reconstructing the bulge history by means of the newest dataOct 07 2010The chemical abundances measured in stars of the Galactic bulge offer an unique opportunity to test galaxy formation models as well as impose strong constraints on the history of star formation and stellar nucleosynthesis. The aims of this paper are to ... More
Solar System evolution from compositional mapping of the asteroid beltAug 12 2014Advances in the discovery and characterization of asteroids over the past decade have revealed an unanticipated underlying structure that points to a dramatic early history of the inner Solar System. The asteroids in the main asteroid belt have been discovered ... More
Dynamical moderate deviations for the Curie-Weiss modelJul 18 2016We derive moderate deviation principles for the trajectory of the empirical magnetization of the standard Curie-Weiss model via a general analytic approach based on convergence of generators and uniqueness of viscosity solutions for associated Hamilton-Jacobi ... More
Synchronization and spin-flop transitions for a mean-field XY model in random fieldDec 13 2015Apr 15 2016We characterize the phase space for the infinite volume limit of a ferromagnetic mean-field XY model in a random field pointing in one direction with two symmetric values. We determine the stationary solutions and detect possible phase transitions in ... More
Mathematical modeling of local perfusion in large distensible microvascular networksSep 28 2016Microvessels -blood vessels with diameter less than 200 microns- form large, intricate networks organized into arterioles, capillaries and venules. In these networks, the distribution of flow and pressure drop is a highly interlaced function of single ... More
The Higgs boson and the International Linear ColliderJul 08 2014The Higgs boson will be subject of intense experimental searches in future high-energy experiments. In addition to the effort made at the Large Hadron Collider, where it was discovered, it will be the major subject of study at the International Linear ... More
Contrasting copper evolution in Omega Centauri and the Milky WayMar 29 2007Despite the many studies on stellar nucleosynthesis published so far, the scenario for the production of Cu in stars remains elusive. In particular, it is still debated whether copper originates mostly in massive stars or type Ia supernovae. To answer ... More
The influence of nova nucleosynthesis on the chemical evolution of the GalaxyJan 14 2000We adopt up-to-date yields of 7Li, 13C, 15N from classical novae and use a well tested model for the chemical evolution of the Milky Way in order to predict the temporal evolution of these elemental species in the solar neighborhood. In spite of major ... More
Baryon history and cosmic star formation in non-Gaussian cosmological models: numerical simulationsMar 16 2011Apr 18 2011We present the first numerical, N-body, hydrodynamical, chemical simulations of cosmic structure formation in the framework of non-Gaussian models. We study the impact of primordial non-Gaussianities on early chemistry (e, H, H+, H-, He, He+, He++, H2, ... More
2D kinematic signatures of boxy/peanut bulgesMar 31 2015We study the imprints of boxy/peanut structures on the 2D line-of-sight kinematics of simulated disk galaxies. The models under study belong to a family with varying initial gas fraction and halo triaxiality, plus few other control runs with different ... More
Derived dualities induced by a 1-cotilting bimoduleJun 17 2013In this paper we characterize the modules and the complexes involved in the dualities induced by a 1-cotilting bimodule in terms of a linear compactness condition. Our result generalizes the classical characterization of reflexive modules with respect ... More
On explosive solutions for a class of quasi-linear elliptic equationsMar 07 2012We study existence, uniqueness, multiplicity and symmetry of large solutions for a class of quasi-linear elliptic equations. Furthermore, we characterize the boundary blow-up rate of solutions, including the case where the contribution of boundary curvature ... More
Compactness and Bubbles Analysis for 1/2-harmonic MapsOct 09 2012In this paper we study compactness and quantization properties of sequences of 1/2-harmonic maps $u_k\colon\R\to {\cal{S}}^{m-1}$ such that $|u_k|_{\dot H^{1/2}(\R,{\cal{S}}^{m-1})}\le C.$ More precisely we show that there exist a weak 1/2-harmonic map ... More
Nonisotrivial families over curves with fixed point free automorphismsSep 06 2005Sep 22 2005We construct for any smooth projective curve of genus $q\ge 2$ with a fixed point free automorphism a nonisotrivial family of curves. Moreover we study the space of modular curves and that of parameters.
Impact of the neutron matter equation of state on neutron skin and neutron drip lines in chiral effective field theoryMay 26 2016Oct 01 2016We present predictions of the binding energy per nucleon and the neutron skin thickness in highly neutron-rich isotopes of Oxygen, Magnesium, and Aluminum. The calculations are carried out at and below the neutron drip line as predicted by our model. ... More
An inversion method based on random sampling for real-time MEG neuroimagingOct 05 2016The MagnetoEncephaloGraphy (MEG) has gained great interest in neurorehabilitation training due to its high temporal resolution. The challenge is to localize the active regions of the brain in a fast and accurate way. In this paper we use an inversion ... More