Abstract
In the paper one considers second-order elliptic equations with measurable coefficients in nondivergence form. One proves for them Harnack's inequality and one estimates the Hölder exponent of the solutions. One makes no assumption regarding the smallness of the dispersion of the eigenvalues of the matrix of the coefficients of the second-order derivatives.
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Literature cited
O. A. Ladyzhenskaya and N. N. Ural'tseva, Linear and Quasilinear Elliptic Equations, Academic Press, New York (1968).
O. A. Ladyzhenskaya, V. A. Solonnikov and N. N. Ural'tseva, Linear and Quasilinear Equations of Parabolic Type, Amer. Math. Soc. Providence (1968).
E. M. Landis, Second Order Equations of Elliptic and Parabolic Type [in Russian], Nauka, Moscow (1971).
A. Friedman, Partial Differential Equations of Parabolic Type, Prentice-Hall, Englewood Cliffs (1964).
L. Nirenberg, “On nonlinear elliptic partial differential equations and Hölder continuity,' Commun. Pure Appl. Math.,6, 103–156 (1953).
H. O. Cordes, “Uber die erste Randwertaufgabe bei quasilinearen Differentialgleichungen zweiter Ordnung in mehr als zwei Variablen,” Math. Ann.131, 278–312 (1956).
N. V. Krylov and M. V. Safonov, “An estimate of the probability that a diffusion process hits a set of positive measure,” Dokl. Akad. Nauk SSSR,245, No. 1, 18–20 (1979).
A. D. Akeksandrov, “Majorization of solutions of second-order linear equations,” Vestn. Leningr. Univ., Ser. Math. Mekh. Astron., No. 1. 5–25 (1966).
M. de Guzman, Differentiation of Integrals in ℝn, Lecture Notes in Mathematics, No. 481, Springer-Verlag, Berlin (1975).
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Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova Akad. Nauk SSSR, Vol. 96, pp. 272–287, 1980.
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Safonov, M.V. Harnack's inequality for elliptic equations and the Hölder property of their solutions. J Math Sci 21, 851–863 (1983). https://doi.org/10.1007/BF01094448
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DOI: https://doi.org/10.1007/BF01094448