Seminars & Colloquia Calendar
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.