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Computational Methods and Function Theory 9 (2009), No. 1, 111--125
Copyright Heldermann Verlag 2009

Dirichlet's Problem and Complex Lightning Bolts

Erik Lundberg
elundber@mail.usf.edu , University of South Florida, Mathematics, 4202 E. Fowler Ave., PHY114, Tampa FL 33617, U.S.A.

[Abstract-pdf] [Abstract-ps]

We consider the Dirichlet problem in the plane with entire data on algebraic curves. More specifically we will be interested in where singularities develop when a solution is continued analytically. Our approach relies on the annihilator method from functional analysis. The annihilating measures are supported on finite sets called lightning bolts.

Keywords: Entire data, algebraic curve, lightning bolt, singularity, analytic continuation, approximation by superpositions.

MSC 2000: Primary 30E25; Secondary 35J25.

[FullText-pdf (372 K)] [FullText-ps (3392 K)]