The First International Congress of Basic Science (ICBS)

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David Gabai

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Princeton University

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378

Date	Time	Local Time	Room	Session	Role	Topic
2023-07-18	15:15-16:00	2023-07-18,15:15-16:00	LR9 (A6 1F)	07-18 Afternoon Math Lecture Room 9 (A6 1F)	Speaker	Homotopy vs isotopy in smooth 4-manifold topology We survey recent results in this long-standing subject. For example, the cited paper showed that under quite general conditions two homotopic smoothly embedded 2-spheres in a 4-manifold with a common dual sphere are in fact isotopic.