# Dehn surgery and rational homology balls – Marco Golla (Uppsala)

#### Venue

Sala Seminari (Dip. Matematica).

#### Abstract

Which 3-manifolds bound rational homology 4-balls? This question arises naturally in a variety of settings, and we address it in the case of surgeries along knots and their cables. The techniques we use are a combination of Heegaard Floer homology and Donaldson theorem. This is joint work (partly in progress) with Paolo Aceto, Kyle Larson, and Ana Lecuona.

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