A Dirichlet type problem for complex polyharmonic functions
  We extend holomorphically polyharmonic functions on a real ball to a complex set being the union of rotated balls. We solve a Dirichlet type problem for complex polyharmonic functions with the boundary condition given on the union of rotated spheres. 
Hubert Grzebu{\l}a, S{\l}awomir Michalik
math.AP math.CV