  Funk-Hecke's formula allows a passage from plane waves to radially invariant
functions. It may be adapted to transform axial monogenics into biaxial
monogenics that are monogenic functions invariant under the product group
SO(p)xSO(q). Fueter's theorem transforms holomorphic functions in the plane
into axial monogenics, so that by combining both results, we obtain a method to
construct biaxial monogenics from holomorphic functions.
