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Geometric Analysis Seminar

Instantons and definite intersection forms bounded by homology 3-spheres

Chris Scaduto (Simons Center for Geometry and Physics, Stony Brook)

Location:  Hill 705
Date & time: Tuesday, 02 October 2018 at 3:00PM - 4:00PM

 Abstract:  Using Yang-Mills instanton Floer theory, we find new constraints on the possible definite intersection forms of smooth 4-manifolds bounded by integer homology 3-spheres. These constraints seem inaccessible from Seiberg--Witten and Heegaard Floer theory. The methods used follow the work of Froyshov.

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