229 6.3.2 Partie linéaire pour les modes I et II ,
,
, Equation de Peierls-Nabarro Dynamique vectorielle
, Quelques propriétés mathématiques de l'équation de Peierls-Nabarro Dynamique 237
,
,
, Un théorème d'existence et d'unicité dans le cas non-linéaire, p.248
, Une remarque sur les dérivées fractionnaires
, Résolution numérique de l'équation de Peierls-Nabarro Dynamique 253
,
262 8.3.3 La méthode bloc-par-bloc appliquée à la forme résolue ,
264 8.4.2 Description de la méthode pour un second membre variable, p.265 ,
,
Traveling waves for a bistable equation with nonlocal diffusion, Adv. Differential Equations, vol.20, issue.9, pp.887-936, 2015. ,
Shape optimization by the homogenization method, Applied Mathematical Sciences, vol.146, 2002. ,
DOI : 10.1007/978-1-4684-9286-6
Rapid evaluation of nonreflecting boundary kernels for time-domain wave propagation, SIAM J. Numer. Anal, vol.37, issue.4, pp.1138-1164, 2000. ,
Introduction to numerical stochastic homogenization and the related computational challenges : some recent developments. In Multiscale modeling and analysis for materials simulation, Lect. Notes Ser. Inst. Math. Sci. Natl. Univ. Singap, vol.22, pp.197-272, 2012. ,
URL : https://hal.archives-ouvertes.fr/hal-00624354
The additive structure of elliptic homogenization, Invent. Math, vol.208, issue.3, pp.999-1154, 2017. ,
URL : https://hal.archives-ouvertes.fr/hal-01483468
Quantitative stochastic homogenization and large-scale regularity, 2018. ,
DOI : 10.1007/978-3-030-15545-2
URL : https://hal.archives-ouvertes.fr/hal-01728747
Lipschitz regularity for elliptic equations with random coefficients, Arch. Ration. Mech. Anal, vol.219, issue.1, pp.255-348, 2016. ,
DOI : 10.1007/s00205-015-0908-4
URL : https://hal.archives-ouvertes.fr/ensl-01401892
Lipschitz estimates in almost-periodic homogenization, Comm. Pure Appl. Math, vol.69, issue.10, pp.1882-1923, 2016. ,
DOI : 10.1002/cpa.21616
URL : https://hal.archives-ouvertes.fr/hal-01483384
Quantitative stochastic homogenization of convex integral functionals, Ann. Sci. Éc. Norm. Supér, vol.49, issue.4, pp.423-481, 2016. ,
URL : https://hal.archives-ouvertes.fr/hal-01483473
The numerical solution of integral equations of the second kind, Cambridge Monographs on Applied and Computational Mathematics, 1997. ,
Compactness methods in the theory of homogenization, Comm. Pure Appl. Math, vol.40, issue.6, pp.803-847, 1987. ,
L p bounds on singular integrals in homogenization, Comm. Pure Appl. Math, vol.44, issue.8-9, pp.897-910, 1991. ,
DOI : 10.1002/cpa.3160440805
Fast and oblivious algorithms for dissipative and two-dimensional wave equations, SIAM J. Numer. Anal, vol.55, issue.2, pp.621-639, 2017. ,
DOI : 10.1137/16m1070657
An error analysis of Runge-Kutta convolution quadrature, BIT, vol.51, issue.3, pp.483-496, 2011. ,
Runge-Kutta convolution coercivity and its use for timedependent boundary integral equations, 2017. ,
Convolution quadrature for the wave equation with a nonlinear impedance boundary condition, Math. Comp, vol.87, issue.312, pp.1783-1819, 2018. ,
Quantitative stochastic homogenization : local control of homogenization error through corrector, Mathematics and materials, vol.23, pp.301-327, 2017. ,
Asymptotic analysis for periodic structures, 2011. ,
Semi-discrete shock profiles for hyperbolic systems of conservation laws, Phys. D, vol.115, issue.1-2, pp.109-123, 1998. ,
Continuum limit for three-dimensional mass-spring networks and discrete Korn's inequality, J. Mech. Phys. Solids, vol.54, issue.3, pp.635-669, 2006. ,
Interpolation spaces. An introduction, 1976. ,
From the Newton equation to the wave equation : the case of shock waves, Applied Mathematics Research, pp.338-385, 2017. ,
URL : https://hal.archives-ouvertes.fr/hal-01314690
Approximation locale précisée dans des problèmes multi-échelles avec défauts localisés ,
Precised approximations in elliptic homogenization beyond the periodic setting ,
URL : https://hal.archives-ouvertes.fr/hal-01958207
On correctors for linear elliptic homogenization in the presence of local defects ,
URL : https://hal.archives-ouvertes.fr/hal-01697104
From the Newton equation to the wave equation in some simple cases, Netw. Heterog. Media, vol.7, issue.1, pp.1-41, 2012. ,
A possible homogenization approach for the numerical simulation of periodic microstructures with defects, Milan J. Math, vol.80, issue.2, pp.351-367, 2012. ,
Local profiles for elliptic problems at different scales : defects in, and interfaces between periodic structures, Comm. Partial Differential Equations, vol.40, issue.12, pp.2173-2236, 2015. ,
URL : https://hal.archives-ouvertes.fr/hal-01143193
Asymptotic behavior of Green functions of divergence form operators with periodic coefficients, Appl. Math. Res. Express. AMRX, issue.1, pp.79-101, 2013. ,
URL : https://hal.archives-ouvertes.fr/hal-01079280
Numerical methods for fractional diffusion, 2017. ,
Efficient numerical methods for non-local operators, EMS Tracts in Mathematics. European Mathematical Society (EMS), vol.14, 2010. ,
Lévy matters. III, Lecture Notes in Mathematics, vol.2099, 2013. ,
The Fourier transform and its Applications, 2000. ,
Connecting atomistic and continuous models of elastodynamics, Arch. Ration. Mech. Anal, vol.224, issue.3, pp.907-953, 2017. ,
Approximation of a simple Navier-Stokes model by monotonic rearrangement, Discrete Contin. Dyn. Syst, vol.34, issue.4, pp.1285-1300, 2014. ,
URL : https://hal.archives-ouvertes.fr/hal-00749578
Functional analysis, Sobolev spaces and partial differential equations. Universitext, 2011. ,
Fourier spectral methods for fractionalin-space reaction-diffusion equations, BIT, vol.54, issue.4, pp.937-954, 2014. ,
Connecting atomistic and mesoscale simulations of crystal plasticity, Nature, vol.391, issue.6668, p.669, 1998. ,
Traveling wave solutions in a half-space for boundary reactions, Anal. PDE, vol.8, issue.2, pp.333-364, 2015. ,
Nonlinear equations for fractional Laplacians I, Ann. Inst. H. Poincaré Anal. Non Linéaire, vol.31, issue.1, pp.23-53, 2014. ,
Nonlinear equations for fractional Laplacians II, Trans. Amer. Math. Soc, vol.367, issue.2, pp.911-941, 2015. ,
The mathematical theory of thermodynamic limits : Thomas-Fermi type models, 1998. ,
An introduction to semilinear evolution equations, volume 13 of Oxford Lecture Series in Mathematics and its Applications, 1998. ,
Laguerre functions and their applications to tempered fractional differential equations on infinite intervals, J. Sci. Comput, vol.74, issue.3, pp.1286-1313, 2018. ,
Existence, uniqueness, and asymptotic stability of traveling waves in nonlocal evolution equations, Adv. Differential Equations, vol.2, issue.1, pp.125-160, 1997. ,
Existence of traveling waves in the fractional bistable equation, Arch. Math. (Basel), vol.100, issue.5, pp.473-480, 2013. ,
The relation between dislocation velocity and stress, Scripta metallurgica, vol.4, issue.10, pp.811-814, 1970. ,
A spectral method for numerical elastodynamic fracture analysis without spatial replication of the rupture event, Journal of the Mechanics and Physics of Solids, vol.45, issue.8, pp.1393-1418, 1997. ,
Comparison of finite difference and boundary integral solutions to three-dimensional spontaneous rupture, Journal of Geophysical Research : Solid Earth, vol.110, issue.B12, 2005. ,
A continuum limit of the Toda lattice, vol.131, 1998. ,
Dynamic dislocation modeling by combining Peierls-Nabarro and Galerkin methods, Physical Review B, vol.70, issue.2, p.24106, 2004. ,
Modeling dislocation by coupling Peierls-Nabarro and element-free Galerkin methods, Computer methods in applied mechanics and engineering, vol.196, pp.1915-1923, 2007. ,
Mesoscopic simulations of dislocations and plasticity, Materials Science and Engineering : A, vol.234, pp.8-14, 1997. ,
Field dislocation mechanics for heterogeneous elastic materials : a numerical spectral approach, Comput. Methods Appl. Mech. Engrg, vol.315, pp.921-942, 2017. ,
DOI : 10.1016/j.cma.2016.11.036
URL : https://hal.archives-ouvertes.fr/hal-01947367
Estimates for Green's matrices of elliptic systems by L p theory, Manuscripta Math, vol.88, issue.2, pp.261-273, 1995. ,
DOI : 10.1007/bf02567822
A direct comparison between in-situ transmission electron microscopy observations and dislocation dynamics simulations of interaction between dislocation and irradiation induced loop in a zirconium alloy, Scripta Materialia, vol.119, pp.71-75, 2016. ,
URL : https://hal.archives-ouvertes.fr/hal-01729350
Cauchy-Born rule and the stability of crystalline solids : dynamic problems, Acta Math. Appl. Sin. Engl. Ser, vol.23, issue.4, pp.529-550, 2007. ,
Partial differential equations, Graduate Studies in Mathematics, vol.19, 2010. ,
Measure theory and fine properties of functions, Textbooks in Mathematics, 2015. ,
DOI : 10.1201/9780203747940
The approach of solutions of nonlinear diffusion equations to travelling front solutions, Arch. Rat. Mech. Anal, vol.65, issue.4, pp.335-361, 1977. ,
Computational techniques for fluid dynamics. 1. Springer Series in Computational Physics, 1991. ,
DOI : 10.1007/978-3-642-97035-1
A spectral method for three-dimensional elastodynamic fracture problems, Journal of the Mechanics and Physics of Solids, vol.43, issue.11, pp.1791-1824, 1995. ,
DOI : 10.1016/0022-5096(95)00043-i
URL : http://esag.harvard.edu/rice/174_Geubelle_Rice_JMPS_95.pdf
Multiple integrals in the calculus of variations and nonlinear elliptic systems, Annals of Mathematics Studies, vol.105, 1983. ,
Elliptic partial differential equations of second order, Classics in Mathematics, 2001. ,
DOI : 10.1007/978-3-642-61798-0
Dislocation motion in a viscous medium, Physical Review Letters, vol.20, issue.4, p.157, 1968. ,
DOI : 10.1103/physrevlett.20.157
Non-reflecting boundary conditions, Journal of computational physics, vol.94, issue.1, pp.1-29, 1991. ,
DOI : 10.1016/0021-9991(91)90135-8
A regularity theory for random elliptic operators, 2014. ,
URL : https://hal.archives-ouvertes.fr/hal-01093368
Quantification of ergodicity in stochastic homogenization : optimal bounds via spectral gap on Glauber dynamics, Invent. Math, vol.199, issue.2, pp.455-515, 2015. ,
URL : https://hal.archives-ouvertes.fr/hal-01093405
An adaptive concurrent multiscale method for the dynamic simulation of dislocations, International Journal for Numerical Methods in Engineering, vol.86, issue.4-5, pp.575-597, 2011. ,
Table of integrals, series, and products, 2007. ,
DOI : 10.1115/1.3138251
URL : http://biomechanical.asmedigitalcollection.asme.org/data/journals/jbendy/25673/58_2.pdf
Traveling wave analysis of partial differential equations, 2012. ,
The Green function for uniformly elliptic equations, Manuscripta Math, vol.37, issue.3, pp.303-342, 1982. ,
Traveling wave solutions of Allen-Cahn equation with a fractional Laplacian, Ann. Inst. H. Poincaré Anal. Non Linéaire, vol.32, issue.4, pp.785-812, 2015. ,
Hierarchical matrices : algorithms and analysis, Springer Series in Computational Mathematics, vol.49, 2015. ,
Radiation boundary conditions for the numerical simulation of waves, Acta numerica, vol.8, pp.47-106, 1999. ,
Fast numerical solution of nonlinear Volterra convolution equations, SIAM J. Sci. Statist. Comput, vol.6, issue.3, pp.532-541, 1985. ,
Geometric numerical integration, Springer Series in Computational Mathematics, vol.31, 2006. ,
URL : https://hal.archives-ouvertes.fr/hal-01403326
Solving ordinary differential equations. I Nonstiff problems, Springer Series in Computational Mathematics, vol.8, 1993. ,
Solving ordinary differential equations. II Stiff and differential-algebraic problems, Springer Series in Computational Mathematics, vol.14, 1996. ,
Introduction to numerical analysis, 1987. ,
Theory of dislocations, 1982. ,
Shock waves in the Toda lattice : analysis, Phys. Rev. A, vol.24, issue.3, pp.2595-2623, 1981. ,
Numerical methods for the fractional Laplacian : a finite difference-quadrature approach, SIAM J. Numer. Anal, vol.52, issue.6, pp.3056-3084, 2014. ,
Finite element analysis of geometrically necessary dislocations in crystal plasticity, International Journal for Numerical Methods in Engineering, vol.93, issue.1, pp.66-79, 2013. ,
Homogenization of differential operators and integral functionals, 1994. ,
Decomposition and pointwise estimates of periodic Green functions of some elliptic equations with periodic oscillatory coefficients ,
URL : https://hal.archives-ouvertes.fr/hal-01848268
Mathematical properties of the Weertman equation, Communications in Mathematical Sciences ,
URL : https://hal.archives-ouvertes.fr/hal-01589690
Fourier-based numerical approximation of the Weertman equation for moving dislocations, International Journal for Numerical Methods in Engineering, vol.113, pp.1827-1850, 2018. ,
URL : https://hal.archives-ouvertes.fr/hal-01510158
Advanced fracture mechanics, Oxford Engineering Science Series, vol.15, 1985. ,
Generalized functions, 2004. ,
Numerical solution of nonlinear hypersingular integral equations of the Peierls type in dislocation theory, SIAM J. Appl. Math, vol.60, issue.2, pp.664-678, 2000. ,
Iterative methods for linear and nonlinear equations, Frontiers in Applied Mathematics. Society for Industrial and Applied Mathematics (SIAM), vol.16, 1995. ,
Homogenization of elliptic systems with Neumann boundary conditions, J. Amer. Math. Soc, vol.26, issue.4, pp.901-937, 2013. ,
Periodic homogenization of Green and Neumann functions, Comm. Pure Appl. Math, vol.67, issue.8, pp.1219-1262, 2014. ,
, of Encyclopedia of Mathematics and its Applications, vol.1, 2009.
The numerical solution of Cauchy singular integral equations with application to fracture, Int. J. Fract, vol.66, issue.2, pp.139-154, 1994. ,
Elastodynamic analysis for slow tectonic loading with spontaneous rupture episodes on faults with rate-and statedependent friction, Journal of Geophysical Research : Solid Earth, vol.105, issue.B10, pp.23765-23789, 2000. ,
The small dispersion limit of the Korteweg-de Vries equation, I. Comm. Pure Appl. Math, vol.36, issue.3, pp.253-290, 1983. ,
Systèmes multi-échelles, Mathématiques & Applications, vol.47, 2005. ,
On the numerical approximation of fluctuations in stochastic homogenization ,
Peierls-Nabarro model of planar dislocation cores in bcc crystals, Czech. J. Phys, vol.22, issue.9, pp.802-812, 1972. ,
Dissociated dislocations in the Peierls-Nabarro model, Czech. J. Phys. B, vol.26, issue.3, pp.294-299, 1976. ,
Gradient estimates for solutions to divergence form elliptic equations with discontinuous coefficients, Arch. Ration. Mech. Anal, vol.153, issue.2, pp.91-151, 2000. ,
Laguerre polynomials and the inverse Laplace transform using discrete data, J. Math. Anal. Appl, vol.337, issue.2, pp.1302-1314, 2008. ,
URL : https://hal.archives-ouvertes.fr/hal-00098062
Analytical and numerical methods for Volterra equations, SIAM Studies in Applied Mathematics. Society for Industrial and Applied Mathematics (SIAM), vol.7, 1985. ,
Adaptive, fast, and oblivious convolution in evolution equations with memory, SIAM J. Sci. Comput, vol.30, issue.2, pp.1015-1037, 2008. ,
A spectral order method for inverting sectorial Laplace transforms, SIAM J. Numer. Anal, vol.44, issue.3, pp.1332-1350, 2006. ,
A nonplanar Peierls-Nabarro model and its application to dislocation cross-slip, Philos. Mag, vol.83, pp.3539-3548, 2003. ,
Generalized-stacking-fault energy surface and dislocation properties of aluminum, Physical Review B, vol.62, issue.5, p.3099, 2000. ,
On the multistep time discretization of linear initial-boundary value problems and their boundary integral equations, Numer. Math, vol.67, issue.3, pp.365-389, 1994. ,
Convolution quadrature revisited, BIT, vol.44, issue.3, pp.503-514, 2004. ,
Fast convolution for nonreflecting boundary conditions, SIAM J. Sci. Comput, vol.24, issue.1, pp.161-182, 2002. ,
Hermite spectral methods for fractional PDEs in unbounded domains, SIAM J. Sci. Comput, vol.39, issue.5, pp.1928-1950, 2017. ,
Ondelettes et opérateurs. II ,
, Opérateurs de Calderón-Zygmund, Actualités Mathématiques. Hermann, 1990.
Theoretical and computational comparison of models for dislocation dissociation and stacking fault/core formation in fcc crystals, J. Mech. Phys. Solids, 2016. ,
From discrete visco-elasticity to continuum rateindependent plasticity : rigorous results, Arch. Ration. Mech. Anal, vol.203, issue.2, pp.577-619, 2012. ,
URL : https://hal.archives-ouvertes.fr/hal-00784831
A non-local formulation of the Peierls dislocation model, Journal of the Mechanics and Physics of Solids, vol.46, issue.10, pp.1845-1867, 1998. ,
Variational models for microstructure and phase transitions, Lecture Notes in Math, vol.1713, 1999. ,
Some basic problems of the mathematical theory of elasticity, 1977. ,
Dislocations in a simple cubic lattice, Proc. Phys. Soc, vol.59, issue.2, p.256, 1947. ,
Front-type solutions of fractional Allen-Cahn equation, Phys. D, vol.237, issue.24, pp.3237-3251, 2008. ,
Approximations for the Bessel and Struve functions, Math. Comp, vol.43, issue.168, pp.551-556, 1984. ,
Convex functions and their applications, 2006. ,
A PDE approach to space-time fractional parabolic problems, SIAM J. Numer. Anal, vol.54, issue.2, pp.848-873, 2016. ,
Three-dimensional earthquake sequence simulations with evolving temperature and pore pressure due to shear heating : Effect of heterogeneous hydraulic diffusivity, Journal of Geophysical Research : Solid Earth, vol.115, issue.B12, 2010. ,
Stable creeping fault segments can become destructive as a result of dynamic weakening, Nature, vol.493, issue.7433, p.518, 2013. ,
Convolution operators and L(p, q) spaces, Duke Math. J, vol.30, pp.129-142, 1963. ,
Boundary value problems with rapidly oscillating random coefficients, Random fields, vol.I, pp.835-873, 1979. ,
The size of a dislocation, Proceedings of the Physical Society, vol.52, issue.1, p.34, 1940. ,
Dynamic Peierls-Nabarro equations for elastically isotropic crystals, Phys. Rev. B, vol.81, p.24101, 2010. ,
URL : https://hal.archives-ouvertes.fr/cea-00412985
Equation of motion and subsonic-transonic transitions of rectilinear edge dislocations : A collective-variable approach, Phys. Rev. B, vol.90, p.54120, 2014. ,
URL : https://hal.archives-ouvertes.fr/cea-01062460
Numerical solutions of the multidimensional Weertman equation ,
Modélisations du mouvement instationnaire et des interactions de dislocations, 2008. ,
Numerical recipes, 2007. ,
Supersonic dislocation kinetics from an augmented Peierls model, Phys. Rev. Lett, vol.86, issue.1, p.95, 2001. ,
On the stability of waves of nonlinear parabolic systems, Advances in Math, vol.22, issue.3, pp.312-355, 1976. ,
Fast and oblivious convolution quadrature, SIAM J. Sci. Comput, vol.28, issue.2, pp.421-438, 2006. ,
The needle problem approach to non-periodic homogenization, Netw. Heterog. Media, vol.6, issue.4, pp.755-781, 2011. ,
Systems of conservation laws, vol.1, 1999. ,
URL : https://hal.archives-ouvertes.fr/ensl-01402415
Bounds of Riesz transforms on L p spaces for second order elliptic operators, Ann. Inst. Fourier (Grenoble), vol.55, issue.1, pp.173-197, 2005. ,
The Calderón-Zygmund lemma revisited, Lectures on the analysis of nonlinear partial differential equations. Part, vol.2, pp.203-224, 2012. ,
The numerical viscosity of entropy stable schemes for systems of conservation laws, I. Math. Comp, vol.49, issue.179, pp.91-103, 1987. ,
The accurate numerical inversion of laplace transforms, IMA Journal of Applied Mathematics, vol.23, issue.1, pp.97-120, 1979. ,
An introduction to Sobolev spaces and interpolation spaces, vol.3, 2007. ,
The general theory of homogenization, Lecture Notes of the Unione Matematica Italiana, vol.7, 2009. ,
Struve functions, 2012. ,
Theory of nonlinear lattices, Springer Series in Solid-State Sciences, vol.20, 1989. ,
Bases physiques de la plasticité des solides. Editions Ecole Polytechnique, 2007. ,
The Toda shock problem, Comm. Pure Appl. Math, vol.44, issue.8-9, pp.1171-1242, 1991. ,
Traveling wave solutions of parabolic systems, Translations of Mathematical Monographs, vol.140, 1994. ,
, Elliptic partial differential equations, vol.2, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01097226
Atomistic simulations and PeierlsNabarro analysis of the Shockley partial dislocations in palladium, Comput. Mater. Sci, vol.15, issue.3, pp.367-379, 1999. ,
Numerical techniques on improving computational efficiency of spectral boundary integral method, International Journal for Numerical Methods in Engineering, vol.102, issue.10, pp.1638-1669, 2015. ,
Dislocations in uniform motion on slip or climb planes having periodic force laws, Mathematical Theory of Dislocations, pp.178-202, 1969. ,
Stress dependence on the velocity of a dislocation moving on a viscously damped slip plane, pp.75-83, 1969. ,
A generalized Peierls-Nabarro model for curved dislocations and core structures of dislocation loops in Al and Cu, Acta Materialia, vol.56, issue.7, pp.1447-1460, 2008. ,
Some remarks on convolution operators and L(p, q) spaces, Duke Math. J, vol.36, pp.647-658, 1969. ,
DOI : 10.1215/s0012-7094-69-03677-1
Functional analysis, Classics in Mathematics, 1995. ,
Two-zone elastic-plastic single shock waves in solids, Physical review letters, vol.107, issue.13, p.135502, 2011. ,
A single theory for some quasistatic, supersonic, atomic, and tectonic scale applications of dislocations, Journal of the Mechanics and Physics of Solids, vol.84, pp.145-195, 2015. ,
A numerical scheme for generalized Peierls-Nabarro model of dislocations based on the fast multipole method and iterative grid redistribution, Commun. Comput. Phys, vol.18, issue.05, pp.1282-1312, 2015. ,
, La principale difficulté des preuves ci-dessous tient au fait que l'on effectue les preuves dans L ? (R), qui est un espace naturel où étudier les solutions de (4.15) (en effet, on s'intéresse ici à des solutions qui ne tendent pas vers 0 en +?), Les annexes de ce chapitre sont en anglais. Nous remercions Gilles Francfort pour ses suggestions en vue de simplifier les preuves de cette section
, Cette erreur, qui semble a priori faible, s'accumule cependant via les intégrales de (8.45). Finalement, cela engendre des erreurs appréciables dans la simulation de (8.2a) sur les temps longs
, malgré la documentation quasiment inexistante sur lesdites fonctions. Ce choix est fondé sur des tests numériques que nous avons effectués. Par ailleurs, précisons que les fonctions issues de [146] sont les seuls fichiers du code que nous n'avons pas écrits nous-mêmes, C'est pourquoi nous avons préféré utiliser les fonctions que l'on trouve dans, vol.146
, Remarques et extensions possibles Nous faisons ici quelques remarques et renvoyons à la publication en préparation, vol.24
, pé-riodique + défaut" que pour démontrer l'existence de correcteurs et d'un potentiel (à savoir la fonction B définie en (B.15)-(B.16) ci-dessous) fortement sous-linéaires. Ainsi, les conclusions du Théorème B.2.1 sont en fait valides sous les hypothèses suivantes, plus générales que celles utilisées ici : 1. la matrice a est elliptique, bornée, La démonstration du Théorème B.2.1 ne fait usage de l'hypothèse de la structure
, elle admet un correcteur w j , c'est-à-dire une solution de (B, vol.3
, correcteur est fortement sous-linéaire à l'infini, c'est-à-dire qu'il vérifie (B.8)
, il existe un potentiel B associé (i.e une solution antisymétrique de (B.15)-(B.16) ci-dessous), qui est lui aussi fortement sous-linéaire, c'est-à-dire qu'il vérifie (B.19)
, B.3.2 Autres remarques
, La preuve esquissée ici est faite dans le cas où a est scalaire. Toutefois, il est possible de travailler avec un coefficient matriciel, On obtient alors des résultats analogues
, Par conséquent, dans la mesure où l'existence des correcteurs w j est aussi prouvée dans [25] pour le cas des systèmes, il semble a priori possible de démontrer un résultat analogue au Théo-rème B.2.1 dans le cadre d'un système d'équations. Une telle adaptation n'a cependant pas été entreprise. Voir à ce sujet la Remarque 69 ci-dessous. Notons que, dans le cas d'une équation
, De la même manière que dans [94], il est possible d'approximer la fonction de Green G ? relative à l'Equation (B.1), ainsi que ses gradients x G ? et y G ? , et son gradient croisé x y G ?
, Toutefois, dans le cas d'une matrice périodique, Les estimations (B.11) et (B.12) sont des estimations à l'intérieur du domaine
, On peut aussi montrer dans le cadre du Théorème B.2.1 que, si f ? L p (?), pour tout p ? [2, +?[, alors R ? L p (?) ? C? ?r f L p (?) et R ? L p (? 1 ) ? C? ?r f L p (?)
, L'estimation sur R ? est immédiate vu le schéma de preuve ci-dessous. L'estimation sur R ? découle d'un Lemme de mesure à la Calderón-Zygmund
, Notre schéma de preuve suit celui des articles, vol.94
pour ? = 0, l'équation est à coefficients constants, donc vérifie des estimations de régularité elliptique, à la fois de type Schauder (en normes C k,? ) ,
, avec un second membre nul) : on obtient l'estimation