SOME DIFFERENTIABILITY PROPERTIES OF SOLUTIONS OF ELLIPTIC EQUATIONS WITH MEASURABLE COEFFICIENTS

1986 ◽  
Vol 27 (3) ◽  
pp. 601-606
Author(s):  
N S Nadirashvili
Author(s):  
Tonia Ricciardi

We prove a sharp Hölder estimate for solutions of linear, two-dimensional, divergence-form, elliptic equations with measurable coefficients, such that the matrix of the coefficients is symmetric and has unit determinant. Our result extends some previous work by Piccinini and Spagnolo. The proof relies on a sharp Wirtinger type inequality.


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