Rectilinearly and rectifiably ambiguous points of a function harmonic inside a sphere
Regularizing sets of irregular points.
Relative Fatou theorem for harmonic functions of rotation invariant stable processes in smooth domains
For domains we give exact asymptotics near the domain’s boundary for the Green function and Martin kernel of the rotation invariant α-stable Lévy process. We also obtain a relative Fatou theorem for harmonic functions of the stable process.
Restricted mean value property in axiomatic potential theory