Vanishing conjecture for higher localised -genera
Vanishing conjecture for higher localised -genera
Let be a discrete group acting properly and cocompactly on a connected spin manifold . Let denote the classifying space for proper actions, let be the classifying map, and let be a -invariant lift of a closed differential form on the orbifold whose cohomology class is for some . For each , let be the fixed-point submanifold, let be the centraliser of , and let be a cut-off function for the proper cocompact action of on . Define
Vanishing conjecture for higher localised -genera. If admits a -invariant Riemannian metric of positive scalar curvature, then for every closed -form constructed as above and every ,
This is the proposed positive-scalar-curvature obstruction for proper cocompact actions, extending the torsion-free setting and incorporating fixed-point contributions from elements of ; the source gives no evidence of a resolution.
Sources & referencesView supporting material
Primary source
Hao Guo and Varghese Mathai, “Higher localised A-genera for proper actions and applications”, arXiv:2108.01838 (2022).
Progress summary
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