Abstract
It is known that corners of interior angle less than π/2 in the boundary of a plane domain are initially stationary for Hele–Shaw flow arising from an arbitrary injection point inside the domain. This paper establishes the corresponding result for Laplacian growth of domains in higher dimensions. The problem is treated in terms of evolving families of quadrature domains for subharmonic functions.
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Gardiner, S.J., Sjödin, T. Stationary Boundary Points for a Laplacian Growth Problem in Higher Dimensions. Arch Rational Mech Anal 213, 503–526 (2014). https://doi.org/10.1007/s00205-014-0750-0
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DOI: https://doi.org/10.1007/s00205-014-0750-0