Topology Seminar | Søren Galatius (Columbia University)

Name: Topology Seminar | Søren Galatius (Columbia University)
Start: 2026-04-06T16:00:00-05:00
End: 2026-04-06T17:00:00-05:00
Location: Lunt Hall, 105

Monday, April 6, 2026 | 4:00 PM - 5:00 PM CT

Lunt Hall, 105, 2033 Sheridan Road, Evanston, IL 60208 map it

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Title: Moduli spaces of metric graphs
Abstract: There is a moduli space of (finite, not necessarily connected) metric graphs, equipped with a homotopy commutative product, a homotopy associative coproduct, and a compatible filtration. In recent joint work with Brown, Chan, and Payne, we explained how this moduli space provides a space-level lift of a certain rational chain complexes arising in descriptions of derived automorphism groups of operads. I will sketch a proposed Koszul dual to this moduli space.

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Noah Riggenbach
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Department of Mathematics: Topology Seminar

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Topology Seminar | Søren Galatius (Columbia University)

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