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Formality of cochains on BG
Published 4 May 2022 in math.AT | (2205.02080v2)
Abstract: Let $G$ be a compact Lie group with maximal torus $T$. If $|N_G(T)/T|$ is invertible in the field $k$ then the algebra of cochains $C*(BG;k)$ is formal as an $A_\infty$ algebra, or equivalently as a DG algebra.
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