Applied Analysis
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Nondegeneracy of heteroclinic orbits for a class of potentials on the plane
(2021)In the scalar case, the nondegeneracy of heteroclinic orbits is a wellknown property, commonly used in problems involving nonlinear elliptic, parabolic or hyperbolic P.D.E. On the other hand, Schatzman proved that in the ... 
On a probabilistic model for martensitic avalanches incorporating mechanical compatibility
(20210701)Building on the work by Ball et al (2015 MATEC Web of Conf. 33 02008), Cesana and Hambly (2018 A probabilistic model for interfaces in a martensitic phase transition arXiv:1810.04380), Torrents et al (2017 Phys. Rev. E 95 ... 
A comparison principle for vector valued minimizers of semilinear elliptic energy, with application to dead cores
(2021)We establish a comparison principle providing accurate upper bounds for the modulus of vector valued minimizers of an energy functional, associated when the potential is smooth, to elliptic gradient systems. Our assumptions ... 
Leaky Cell Model of Hard Spheres
(90320)We study packings of hard spheres on lattices. The partition function, and therefore the pressure, may be written solely in terms of the accessible free volume, i.e., the volume of space that a sphere can explore without ... 
Double layered solutions to the extended Fisher–Kolmogorov P.D.E.
(20210622)We construct double layered solutions to the extended Fisher–Kolmogorov P.D.E., under the assumption that the set of minimal heteroclinics of the corresponding O.D.E. satisfies a separation condition. The aim of our work ... 
The Well Order Reconstruction Solution for ThreeDimensional Wells, in the Landaude Gennes theory.
(2019)We study nematic equilibria on threedimensional square wells, with emphasis on Well Order Reconstruction Solu tions (WORS) as a function of the well size, characterized by λ, and the well height denoted by ε. The WORS ... 
Symmetry and Multiplicity of Solutions in a TwoDimensional Landau–de Gennes Model for Liquid Crystals
(20200520)We consider a variational twodimensional Landau–de Gennes model in the theory of nematic liquid crystals in a disk of radius R. We prove that under a symmetric boundary condition carrying a topological defect of degree ... 
Landaude Gennes Corrections to the OseenFrank Theory of Nematic Liquid Crystals
(20200103)We study the asymptotic behavior of the minimisers of the Landaude Gennes model for nematic liquid crystals in a twodimensional domain in the regime of small elastic constant. At leading order in the elasticity constant, ... 
A Scaling Limit from the Wave Map to the Heat Flow Into S2
(20190708)In this paper we study a limit connecting a scaled wave map with the heat flow into the unit sphere 𝕊2. We show quantitatively how the two equations are connected by means of an initial layer correction. This limit is ... 
On a sharp Poincaretype inequality on the 2sphere and its application in micromagnetics
(20190821)The main aim of this note is to prove a sharp Poincarétype inequality for vectorvalued functions on $\mathbb{S}^2$ that naturally emerges in the context of micromagnetics of spherical thin films. 
Design of effective bulk potentials for nematic liquid crystals via colloidal homogenisation
(20200201)We consider a Landau–de Gennes model for a suspension of small colloidal inclusions in a nematic host. We impose suitable anchoring conditions at the boundary of the inclusions, and we work in the dilute regime — i.e. the ... 
The Well Order Reconstruction Solution for threedimensional wells, in the Landau–de Gennes theory
(20200301)We study nematic equilibria on threedimensional square wells, with emphasis on Well Order Reconstruction Solutions (WORS) as a function of the well size, characterized by 𝜆, and the well height denoted by 𝜖. The WORS ... 
An optimal scaling to computationally tractable dimensionless models: Study of latex particles morphology formation
(202002)In modelling of chemical, physical or biological systems it may occur that the coefficients, multiplying various terms in the equation of interest, differ greatly in magnitude, if a particular system of units is used. Such ... 
Models for damped water waves
(2019)In this paper we derive some new weakly nonlinear asymptotic models describing viscous waves in deep water with or without surface tension effects. These asymptotic models take into account several different dissipative ... 
Minimizers of a Landaude Gennes energy with a subquadratic elastic energy
(2019)We study a modified Landaude Gennes model for nematic liq uid crystals, where the elastic term is assumed to be of subquadratic growth in the gradient. We analyze the behaviour of global minimizers in two and threedimensional ... 
Convex Integration Arising in the Modelling of ShapeMemory Alloys: Some Remarks on Rigidity, Flexibility and Some Numerical Implementations
(20190330)We study convex integration solutions in the context of the modelling of shapememory alloys. The purpose of the article is twofold, treating both rigidity and flexibility prop erties: Firstly, we relate the maximal ... 
Topological singular set of vectorvalued maps, I: application to manifoldconstrained Sobolev and BV spaces
(20190330)We introduce an operator $\mathbf{S}$ on vectorvalued maps $u$ which has the ability to capture the relevant topological information carried by $u$. In particular, this operator is defined on maps that take values in a ... 
Order Reconstruction for neatics on squares with isotropic inclusions: A Landaude Gennes study
(20190330)e study a modified Landaude Gennes model for nematic liq uid crystals, where the elastic term is assumed to be of subquadratic growth in the gradient. We analyze the behaviour of global minimizers in two and threedimensional ... 
The excluded volume of twodimensional convex bodies: shape reconstruction and nonuniqueness
(20190205)In the Onsager model of onecomponent hardparticle systems, the entire phase behaviour is dictated by a function of relative orientation, which represents the amount of space excluded to one particle by another at this ... 
Asymptotic models for free boundary flow in porous media
(2019)We provide rigorous asymptotic models for the free boundary Darcy and Forchheimer problem under the assumption of weak nonlinear interaction, in a regime in which the steepness parameter of the interface is considered to ...