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Emmy-Noether-Seminar

Nov 29
29-11-2019 14:30 Uhr bis 15:30 Uhr
Raum 04.363, Cauerstraße 11, Erlangen

On the Toral Rank Conjecture and formality

Leopold Zoller (München)

Abstract: We give an introduction to the Toral Rank Conjecture. It was posed by Steve Halperin roughly 40 years ago and states that if a compact r-dimensional torus acts freely on a finite CW-complex X, then the sum of all Betti numbers satisfies dim H*(X,Q) ≥ 2r. Using formality and related concepts we explore connections to other conjectures and prove the Toral Rank Conjecture in special cases.