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Sep 27, 2015 at 20:05 vote accept user51223
Jul 27, 2015 at 20:50 comment added user51223 @SeanTilson Thanks. I have not looked at their paper closely, if you mean the one which they try to locate characteristic classes for manifold bundles. I suppose what you suggest is already in the paper of Galatius-Madsen-Tillmann-Weiss which considers the infinite loop space associated to a Madsen-Tillmann spectrum as the classifying space for manifold bundles.
Jul 27, 2015 at 20:26 history edited user51223 CC BY-SA 3.0
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Jul 27, 2015 at 20:21 comment added user51223 @ThiKu This is the work of Madsen and Weiss, later on followed by Galatius, Madsen, Tillmann, and Weiss. Yet, I have to add that Madsen-Tillmann map is really a map $\mathbb{Z}\times B\Gamma_\infty^+\to\Omega^\infty\mathbb{C}P_{-1}$.
Jul 27, 2015 at 20:07 answer added Dmitri Pavlov timeline score: 10
Jul 27, 2015 at 19:43 comment added Sean Tilson @ThiKu It is not obvious. This takes a lot of work.
Jul 27, 2015 at 19:42 comment added Sean Tilson Yes, I was going to suggest you look at the work done in this vein. Maybe recent work of Galatius and Randal-Williams about moduli spaces of manifold bundles will be helpful. There are even videos of lectures Soren and Oscar gave at MSRI online.
Jul 27, 2015 at 19:01 comment added ThiKu For the question to make sense you should give some indication what ${\mathcal M}_C$ should be. In your example it is the moduli space of Riemann surfaces, but I don't see how this is related to the cobordism category.
Jul 27, 2015 at 16:00 history asked user51223 CC BY-SA 3.0