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Moduli spaces of compact RCD(0,N)-structures.

Andrea MondinoDimitri Navarro
Published in: Mathematische annalen (2022)
The goal of the paper is to set the foundations and prove some topological results about moduli spaces of non-smooth metric measure structures with non-negative Ricci curvature in a synthetic sense (via optimal transport) on a compact topological space; more precisely, we study moduli spaces of RCD ( 0 , N ) -structures. First, we relate the convergence of RCD ( 0 , N ) -structures on a space to the associated lifts' equivariant convergence on the universal cover. Then we construct the Albanese and soul maps, which reflect how structures on the universal cover split, and we prove their continuity. Finally, we construct examples of moduli spaces of RCD ( 0 , N ) -structures that have non-trivial rational homotopy groups.
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