A note on the Harnack inequality for elliptic equations in divergence form

Published 18 Jan 2019 in math.AP | (1901.06128v1)

Abstract: In 1957, De Giorgi [3] proved the H\"{o}lder continuity for elliptic equations in divergence form and Moser [7] gave a new proof in 1960. Next year, Moser [8] obtained the Harnack inequality. In this note, we point out that the Harnack inequality was hidden in [3].

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