Twistor theory and the harmonic hull
arXiv:1012.2620
Abstract
We use twistor theory to identify the harmonic hull of an arbitrary connected open subset U of R^{2m} for m at least 2. It is the natural domain of analytic continuation in C^{2m} for harmonic functions on U.
17 pages. Several misprints are corrected and a dedication to Joseph Wolf is added