Minimal thinness with respect to symmetric L\'evy processes
  Minimal thinness is a notion that describes the smallness of a set at a boundary point. In this paper, we provide tests for minimal thinness at finite and infinite minimal Martin boundary points for a large class of purely discontinuous symmetric L\'evy processes. 
Panki Kim, Renming Song, Zoran Vondra\v{c}ek
math.PR