Products and push-forwards in parametrised cohomology theories
Abstract
We define a symmetric monoidal structure on the parametrised stable homotopy category over a base space with an action of an E∞ operad. We discuss products, orientations and push-forwards in parametrised cohomology theories corresponding to parametrised ring spectra. Finally, we construct parametrised ring spectra representing twisted K-theory and twisted Spinc-cobordism.
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