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Framed discs operads and the equivariant recognition principle

Paolo Salvatore·Nathalie Wahl
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Abstract

The framed n-discs operad fD_n is studied as semidirect product of SO(n) and the little n-discs operad. Our equivariant recognition principle says that a grouplike space acted on by fD_n is equivalent to the n-fold loop space on a SO(n)-space. Examples of fD_2-spaces are nerves of ribbon braided monoidal categories. We compute the rational homology of fD_n. Koszul duality for semidirect product operads of chain complexes is defined and applied to compute the double loop space homology as BV-algebra.

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Paolo Salvatore, Nathalie Wahl. 2001-06-28. Framed discs operads and the equivariant recognition principle. https://arxiv.org/abs/math/0106242

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