%0 Journal Article %T Mean Curvature Flows and Isotopy of Maps Between Spheres %A Mao-Pei Tsui %A Mu-Tao Wang %J Mathematics %D 2003 %I arXiv %X Let f be a smooth map between unit spheres of possibly different dimensions. We prove the global existence and convergence of the mean curvature flow of the graph of f under various conditions. A corollary is that any area-decreasing map between unit spheres (of possibly different dimensions) is homotopic to a constant map. %U http://arxiv.org/abs/math/0302242v2