# American Institute of Mathematical Sciences

September  2005, 4(3): 499-522. doi: 10.3934/cpaa.2005.4.499

## Uniformly elliptic Liouville type equations: concentration compactness and a priori estimates

 1 Department of Mathematics, University of Rome "Tre", Rome, Italy 2 Department of Mathematics, University of Rome "La Sapienza", Rome, Italy

Received  August 2004 Revised  March 2005 Published  June 2005

We analyze the singular behavior of the Green's function for uniformly elliptic equations on smooth and bounded two dimensional domains. Then, we are able to generalize to the uniformly elliptic case some sharp estimates for Liouville type equations due to Brezis-Merle [7] and, in the same spirit of [3], a "mass" quantization result due to Y.Y. Li [21]. As a consequence, we obtain uniform a priori estimates for solutions of the corresponding Dirichlet problem. Then, we improve the standard existence theorem derived by direct minimization and, in the same spirit of [17] and [37], obtain the existence of Mountain Pass type solutions.
Citation: D. Bartolucci, L. Orsina. Uniformly elliptic Liouville type equations: concentration compactness and a priori estimates. Communications on Pure & Applied Analysis, 2005, 4 (3) : 499-522. doi: 10.3934/cpaa.2005.4.499
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