Tuesday, May 31, 2022 4:00 PM
Masaaki Ue (Kyoto University)

We give constraints on intersection forms of spin 4-manifolds bounded by Seifert rational homology 3-spheres in terms of the \overline{μ} invariant and compare them with those in terms of the κ invariant given by Manolescu. We also show that the difference between κ and -\overline{μ} for a Seifert rational homology 3-sphere with spin structure is at most 2, and these invariants coincide with each other under some extra conditions.