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The Oriented Freudenthal Suspension Theorem

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Speaker: 
Thorger Geiß
Zugehörigkeit: 
Universität Münster
Datum: 
Die, 13/10/2026 - 11:00 - 12:30
Location: 
MPIM Seminar Room

The classical Freudenthal Suspension Theorem is the statement that, given a space X, the connectivity of the unit map X -> ΩΣX of the loop-suspension adjunction is (roughly) twice the connectivity of X. In this talk, I will discuss the setting of oriented (or directed) homotopy theory, in which spaces are replaced by higher, i.e. (∞,ω)-, categories and the cartesian product by the Gray tensor product, and generalize the Freudenthal Suspension Theorem in this context. This gives, in particular, evidence for a yet-elusive "oriented topos theory".

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