Liouville Theorem for semilinear elliptic inequalities with the fractional Hardy operators

Abstract

In this paper, we give a full classification of the nonexistence of positive weak solutions to the semilinear elliptic inequality involving the fractional Hardy potential in punctured and in exterior domains. Our methods are self-contained and new. The main ideas and key ingredients will be discussed in the next section after Theorem 1.1 for punctured domains, and after Theorem 1.4 for exterior domains. We will also explain why all the previous methods and techniques do not apply to our general setting. Let us give here a foretaste of our line of attack: Based on the imbalance between the Hardy operator and the nonlinearity, we can obtain an initial asymptotic behavior rate at the origin ( for punctured domains) or at infinity ( exterior domains).We then improve this rate by using the interaction with the nonlinearity. By repeating this process finite number of times, a contradiction will be deduced from the nonexistence for the related non-homogeneous fractional Hardy problem. This process allows us to obtain the nonexistence for the fractional Hardy problem with larger ranges . Our study covers all possible ranges, and our results are optimal.