%0 Journal Article
%T Twisted K-theory and obstructions against positive scalar curvature metrics
%A Ulrich Pennig
%J Mathematics
%D 2011
%I arXiv
%R 10.1017/is014003008jkt259
%X We decompose the twisted index obstruction $\theta(M)$ against positive scalar curvature metrics for oriented manifolds with spin universal cover into a pairing of a twisted $K$-homology with a twisted $K$-theory class and prove that $\theta(M)$ does not vanish if $M$ is an orientable enlargeable manifold with spin universal cover.
%U http://arxiv.org/abs/1108.3701v3