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The Hele-Shaw flow and moduli of holomorphic discs

Published online by Cambridge University Press:  18 August 2015

Julius Ross
Affiliation:
Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, UK email j.ross@dpmms.cam.ac.uk
David Witt Nyström
Affiliation:
Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, UK email danspolitik@gmail.com
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Abstract

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We present a new connection between the Hele-Shaw flow, also known as two-dimensional Laplacian growth, and the theory of holomorphic discs with boundary contained in a totally real submanifold. Using this, we prove short-time existence and uniqueness of the Hele-Shaw flow with varying permeability both when starting from a single point and also when starting from a smooth Jordan domain. Applying the same ideas, we prove that the moduli space of smooth quadrature domains is a smooth manifold whose dimension we also calculate, and we give a local existence theorem for the inverse potential problem in the plane.

Information

Type
Research Article
Copyright
© The Authors 2015