Landau-de Gennes minimizers with planar degenerate anchoring converge to the canonical harmonic map with tangential BC, and boojum singularities have tangent maps given by half-bubbles with hedgehog or anti-hedgehog structure up to planar rotation.
Mattila.Geometry of sets and measures in Euclidean spaces: fractals and rectifiability
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Planar Degenerate Anchoring in Landau-de Gennes Energy
Landau-de Gennes minimizers with planar degenerate anchoring converge to the canonical harmonic map with tangential BC, and boojum singularities have tangent maps given by half-bubbles with hedgehog or anti-hedgehog structure up to planar rotation.