%0 Journal Article %T Well-posedness for the heat flow of harmonic maps and the liquid crystals flow with rough initial data %A Changyou Wang %J Mathematics %D 2010 %I arXiv %R 10.1007/s00205-010-0343-5 %X We investigate the well-posedness of (i) the heat flow of harmonic maps from $R^n$ to a compact Riemannian manifold without boundary for initial data in BMO; and (ii) the hydrodynamic flow $(u,d)$ of nematic liquid crystals on $\mathbb R^n$ for initial data in $BMO^{-1}\times BMO$. %U http://arxiv.org/abs/1001.2296v1