[[!redirects Pennig]] ###Reference Details### +-- cite key : Pennig title : Twisted K-theory and obstructions against positive scalar curvature metrics author : Pennig, U. eprint : <http://arxiv.org/abs/1108.3701v1> mrclass : math.GT note : arXiv:1108.3701v1; 52 pages url : <http://arxiv.org/abs/1108.3701v1> arxiv : [1108.3701](http://www.arxiv.org/abs/1108.3701) refbase : [1895](http://www.math.ntnu.no/~stacey/RefBase/show.php?record=1895) =-- {: .bibliography} --- category: cohomology theories