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Eva Feichtner
A Leray model for Orlik-Solomon algebras
25 avril 2025 - 16:00Salle de conférences IRMA
Although hyperplane arrangement complements are rationally formal, we note that they have rational models which are topologically and combinatorially significant. We construct a combinatorial version of the classical Leray model for arrangement complements that interpolates between the Orlik-Solomon algebra and the Chow ring of a matroid. This gives us the opportunity to present and reconcile much of the Orlik-Solomon and nested set combinatorics that have proven to be rather powerful structural tools in the subject area. -
Lucile Devin
TBA
16 mai 2025 - 16:00Salle de conférences IRMA
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Sybille Schroll
TBA
27 juin 2025 - 16:00Salle de conférences IRMA