%0 Journal Article %T A weak energy identity and the length of necks for a Sacks-Uhlenbeck $¦Á$-harmonic map sequence %A Yuxiang Li %A Youde Wang %J Mathematics %D 2008 %I arXiv %X We will give a weak energy identity for Sacks-Uhlenbeck approximation of harmonic maps and calculate the length of the necks. %U http://arxiv.org/abs/0804.4404v2