# American Institute of Mathematical Sciences

February  2013, 33(2): 739-755. doi: 10.3934/dcds.2013.33.739

## Uniqueness of harmonic map heat flows and liquid crystal flows

 1 Department of Mathematics, South China University of Technology, Guangzhou, 510640

Received  July 2011 Revised  January 2012 Published  September 2012

In this paper, we prove a limiting uniqueness criterion to harmonic map heat flows and liquid crystal flows. We firstly establish the uniqueness of harmonic map heat flows from $R^n$ to a smooth, compact Riemannian manifold $N$ in the class $C([0,T),BMO_T(R^n,N))\cap L^\infty_{loc}((0,T);\dot{W}^{1,\infty}(R^n))$ for $0< T ≤ +\infty.$ For the nematic liquid crystal flows $(v,d)$, we show that the mild solution is unique under the class $C([0,T),BMO_T^{-1}(R^n))\cap L^\infty_{loc}((0,T);L^\infty(R^n))\times C([0,T),BMO_T(R^n,S^2))\cap L^\infty_{loc}((0,T);\dot{W}^{1,\infty}(R^n))$ for $0< T ≤ +\infty.$
Citation: Junyu Lin. Uniqueness of harmonic map heat flows and liquid crystal flows. Discrete & Continuous Dynamical Systems - A, 2013, 33 (2) : 739-755. doi: 10.3934/dcds.2013.33.739
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