Fridays from 2:30-3:30pm in LGRT 1681 at UMass Amherst
Organizers: İnanç Baykur, Patricia Cahn, Miriam Kuzbary, Riccardo Pedrotti and Valentina Zapata Castro
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Speaker: ORGANISATION MEETING
Speaker: Riccardo Pedrotti
Title: An obstruction to the existence of sections for a Lefschetz fibration
Abstract: We characterise the presence of a section for a Lefschetz fibration over the sphere in terms of vanishing of an obstruction class living in a quotient of the fundamental group of the regular fiber. In the case of transitive LF we prove that such obstruction class always vanishes, therefore detecting a smooth section. Time permitting we will also show a computation of this obstruction class to the MCK fibration.
Institution: UMass Amherst
Website: https://riccardopedrotti.github.io
Speaker: Georgios Dimitroglou Rizell
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Institution: Uppsala University
Website: https://www.uu.se/en/contact-and-organisation/staff?query=N7-1534
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Thanksgiving
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