## ABSTRACT

This chapter deals with harmonic and metaharmonic functions in Euclidean spaces Rq. A particular role is played by entire metaharmonic functions, i.e., solutions of the Helmholtz equation which are valid for the whole Euclidean space Rq.

This chapter deals with harmonic and metaharmonic functions in Euclidean spaces Rq. A particular role is played by entire metaharmonic functions, i.e., solutions of the Helmholtz equation which are valid for the whole Euclidean space Rq.