Generalized Bôcher's theorem
The authors present a Laurent-type expansion for harmonic functions in the punctured unit ball of \(\mathbb{R}^ n\) \((n\geq 2)\), together with bounds on the coefficients in the singular part of the expansion. The Laurent expansion for harmonic functions in annuli is well known: see, for example, Chapter 10 of the book by \textit{S. Axler}, \textit{P. Bourdon} and \textit{W. Ramey} [Harmonic function theory (Springer, New York) (1992; Zbl 0765.31001)].
scientific article; zbMATH DE number 710325