A class of functions containing polyharmonic functions in Rn
Victor Anandam, M. Damlakhi · Annales Polonici Mathematici · 2003
Some properties of the functions of the form $v(x)=\sum _{i=0}^m |x|^ih_i(x)$ in ${{\mathbb R}}^n$, $n\ge 2$, where each $h_i$ is a harmonic function defined outside a compact set, are obtained using the harmonic measures.