Abstract
We show a regularity criterion to the harmonic heat flow from 2-dimensional Riemannian manifold M into a sphere. It is shown that a weak solution of the harmonic heat flow from 2-dimensional manifold into a sphere is regular under the criterion
where BMO r is the space of bounded mean oscillations on M. A sharp version of the Sobolev inequality of the Brezis–Gallouet type is introduced on M. A monotonicity formula by the mean oscillation is established and applied for proving such a regularity criterion for weak solutions as above.
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Misawa, M., Ogawa, T. Regularity condition by mean oscillation to a weak solution of the 2-dimensional Harmonic heat flow into sphere. Calc. Var. 33, 391–415 (2008). https://doi.org/10.1007/s00526-008-0166-5
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DOI: https://doi.org/10.1007/s00526-008-0166-5