On the Neumann function and the method of images in spherical and ellipsoidal geometry

George Dassios, Johan C.-E. Sten (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)


The invention of an image system for a boundary value problem adds to a significant understanding of the structure of the problem, both at the mathematical and at the physical level. In this paper, the interior and exterior Neumann functions for the Laplacian in the cases of spherical and ellipsoidal domains are represented in terms of images. Besides isolated images, the presence of the normal derivative in the Neumann condition demands an additional continuous distribution of images, which in the spherical cases, can be restricted to a one‐dimensional manifold, whereas for the ellipsoid, both a one‐dimensional and a two‐dimensional distribution of images is needed.
Original languageEnglish
Pages (from-to)482-496
JournalMathematical Methods in the Applied Sciences
Issue number4
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed



  • Neumann boundary condition
  • Neumann function
  • image system
  • ellipsoidal geometry
  • ellipsoidal harmonics

Cite this