Harmonic Shears of Regular Polygons by Hypergeometric Functions
β Scribed by Kathy Driver; Peter Duren
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 985 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0022-247X
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## Abstract We prove that bounded harmonic functions of anisotropic fractional Laplacians are HΓΆlder continuous under mild regularity assumptions on the corresponding LΓ©vy measure. Under some stronger assumptions the Green function, Poisson kernel and the harmonic functions are even differentiable
A growth lemma for certain discrete symmetric Laplacians defined on a lattice Z d Ξ΄ = Ξ΄Z d β R d with spacing Ξ΄ is proved. The lemma implies a De Giorgi theorem, that the harmonic functions for these Laplacians are equi-HΓΆlder continuous, Ξ΄ β 0. These results are then applied to establish regularity