Potential theory of one-dimensional geometric stable processes

The purpose of this paper is to find optimal estimates for the Green function and the Poisson kernel for a half-line and intervals of the geometric stable process with parameter $α\in(0,2]$. This process has an infinitesimal generator of the form $-\log(1+(-Δ)^{α/2})$. As an application we prove the scale invariant Harnack inequality as well as the boundary Harnack principle.

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