Abstract
In this note we establish two-sided pointwise estimates near the pole of the Green function for \(X\)-elliptic operators in divergence form enjoying the doubling condition and the Poincaré inequality. As a step towards this result, we also prove a nonhomogeneous Harnack inequality, some representation formulas and a result on approximation by regular domains.
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Bramanti, M., Brandolini, L., Lanconelli, E., Uguzzoni, F.: Non-divergence equations structured on Hörmander vector fields: heat kernels and Harnack inequalities. Mem. Amer. Math. Soc. 204(961), vi+123 (2010)
Cancelier, C., Xu, C.J.: Remarques sur les fonctions de Green associées aux opérateurs de Hörmander. C. R. Acad. Sci. Paris Sér. I Math. 330, 433–436 (2000)
Di Fazio, G., Gutiérrez, C.E., Lanconelli, E.: Covering theorems, inequalities on metric spaces and applications to PDE’s. Math. Ann. 341, 255–291 (2008)
Fabes, E., Jerison, D., Kenig, C.: The Wiener test for degenerate elliptic equations. Ann. Inst. Fourier (Grenoble) 32, 151–182 (1982)
Franchi, B., Lanconelli, E.: Une métrique associée à une classe d’opérateurs elliptiques dégénérés. Conference on linear partial and pseudodifferential operators (Torino, 1982). Rend. Sem. Mat. Univ. Politec. Torino, Special Issue, 105–114 (1984)
Franchi, B., Lanconelli, E.: Hölder regularity theorem for a class of linear nonuniformly elliptic operators with measurable coefficients. Ann. Scuola Norm. Sup. Pisa Cl. Sci. 4(10), 523–541 (1983)
Franchi, B., Lanconelli, E.: An embedding theorem for Sobolev spaces related to nonsmooth vector fields and Harnack inequality. Comm. Partial Differ. Equ. 9, 1237–1264 (1984)
Franchi, B., Serapioni, R.: Approximation and imbedding theorems for weighted Sobolev spaces associated with Lipschitz continuous vector fields. Boll. Un. Mat. Ital. B 7(11), 83–117 (1997)
Franchi, B., Lu, G., Wheeden, R.L.: A relationship between Poincaré-type inequalities and representation formulas in spaces of homogeneous type. Internat. Math. Res. Notices 1, 1–14 (1996)
Garofalo, N., Nhieu, D.M.: Isoperimetric and Sobolev inequalities for Carnot-Carathéodory spaces and the existence of minimal surfaces. Comm. Pure Appl. Math. 49, 1081–1144 (1996)
Gilbarg, D., Trudinger, N.S.: Elliptic partial differential equations of second order. Second edition. Grundlehren der Mathematischen Wissenschaften 224, Springer, Berlin (1983)
Gutiérrez, C.E., Lanconelli, E.: Maximum principle, nonhomogeneous Harnack inequality, and Liouville theorems for X-elliptic operators. Comm. Partial Differ. Equ. 28, 1833–1862 (2003)
Hajlasz, P., Koskela, P.: Sobolev met Poincaré. Mem. Amer. Math. Soc. 145(688), x+101 (2000)
Jin, Y.Y.: Hölder continuity for a class of X-elliptic equations with singular lower order term. Appl. Math. J. Chin. Univ. Ser. B 24, 56–64 (2009)
Kogoj, A.E., Lanconelli, E.: Liouville theorem for X-elliptic operators. Nonlinear Anal. 70, 2974–2985 (2009)
Lanconelli, E., Kogoj, A.E.: \(X\)-elliptic operators and \(X\)-control distances. Contributions in honor of the memory of Ennio De Giorgi. Ricerche Mat. 49, 223–243 (2000)
Lanconelli, E., Uguzzoni, F.: Potential analysis for a class of diffusion equations: a Gaussian bounds approach. J. Differ. Equ. 248, 2329–2367 (2010)
Littman, W., Stampacchia, G., Weinberger, H.F.: Regular points for elliptic equations with discontinuous coefficients. Ann. Scuola Norm. Sup. Pisa 3(17), 43–77 (1963)
Mazzoni, G.: Green function for X-elliptic operators. Manuscr. Math. 115, 207–238 (2004)
Phillips, R.S., Sarason, L.: Elliptic-parabolic equations of the second order. J. Math. Mech. 17, 891–917 (1967)
Zheng, S., Feng, Z.: Green functions for a class of nonlinear degenerate operators with X-ellipticity. Trans. Amer. Math. Soc. 364, 3627–3655 (2012)
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This work has been originated from an idea of Ermanno Lanconelli. It is a pleasure to thank him and dedicate this paper to him on the occasion of his 70th birthday.
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Dedicated to Ermanno Lanconelli on the occasion of his 70th birthday.
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Uguzzoni, F. Estimates of the Green function for X-elliptic operators. Math. Ann. 361, 169–190 (2015). https://doi.org/10.1007/s00208-014-1072-0
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DOI: https://doi.org/10.1007/s00208-014-1072-0