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Indefinite Stein fillings and Pin(2)-monopole Floer homology


Speaker: Francesco Lin, Columbia
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Location: 3106 MSB
Start time: Tue, Nov 26 2019, 1:30PM

We discuss some applications of Pin(2)-monopole Floer homology to the topology of Stein fillings of a given rational homology sphere; in particular, we show that under simple hypotheses one can provide severe restrictions on the intersection form of its Stein fillings which are not negative definite.