%0 Journal Article %T Measure valued solutions of the 2D Keller-Segel system %A S. Luckhaus %A Y. Sugiyama %A J. J. L. Vel¨¢zquez %J Mathematics %D 2010 %I arXiv %X We study the solutions of the two-dimensional Keller-Segel system describing chemotaxis. The Keller-Segel system as well as the properties of the blow-up set has been extensively studied. In this paper we obtain generalized solutions for the Keller-Segel system in the sense of measures as the limit of two-different regularizations of it. We will show that the resulting limit measures, that are in some suitable sense global weak solutions of the Keller-Segel system, depend in the regularization. %U http://arxiv.org/abs/1011.0282v1