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On intersection forms of spin $4$-manifolds with AR homology sphere boundary

Hakamada, Eiichiro
arXiv (All) · Papers
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geometric-topology
In this paper, building on the work of Dai--Sasahira--Stoffregen, we derive constraints on the intersection forms of smooth, compact, indefinite, spin $4$-manifolds bounded by AR homology spheres using two methods. First, we use the constraints on the existence of $\operatorname{Pin}(2)$-equivariant
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