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Existence and uniqueness theorems for singular anisotropic quasilinear elliptic boundary value problems
Authors:S. Hill   K. S. Moore   W. Reichel
Affiliation:Department of Mathematics, Rowan University, Glassboro, New Jersey 08028

K. S. Moore ; Department of Mathematics, University of Connecticut, Storrs, Connecticut 06269 ; Mathematisches Institut, Universität zu Köln, 50931 Köln, Germany

Abstract:

On bounded domains $Omegasubsetmathbb{R} ^2$ we consider the anisotropic problems $u^{-a}u_{xx}+u^{-b}u_{yy}=p(x,y)$ in $Omega$ with $a,b>1$ and $u=infty$ on $partialOmega$ and $u^cu_{xx}+u^du_{yy}+q(x,y)=0$ in $Omega$ with $c,dgeq 0$ and $u=0$ on $partialOmega$. Moreover, we generalize these boundary value problems to space-dimensions $n>2$. Under geometric conditions on $Omega$ and monotonicity assumption on $0<p,qin {cal C}^alpha(overline{Omega})$ we prove existence and uniqueness of positive solutions.

Keywords:Anisotropic singular equations   comparison principles
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