Tsygan's cyclic formality conjecture

Let MM be a smooth manifold, let CC(C(M))C C_{-\bullet}^{-}(C^\infty(M)) denote the negative cyclic chain complex of C(M)C^\infty(M), and let (Ω(M)[[u]],ud)(\Omega^{-\bullet}(M)[[u]],ud) be the completed differential-form complex with formal variable uu. The zeroth Taylor component is required to be the Connes quasi-isomorphism, given by the uu-linear extension of the HKR map.

Tsygan's cyclic formality conjecture. There exists a natural C[[u]]\mathbb C[[u]]-linear quasi-isomorphism of LL_\infty-modules

F ⁣:CC(C(M))(Ω(M)[[u]],ud)F\colon CC_{-\bullet}^{-}(C^\infty(M))\rightsquigarrow (\Omega^{-\bullet}(M)[[u]],ud)

such that F0F_0 is the Connes quasi-isomorphism, given by the uu-linear extension of the HKR map.

This is the cyclic or negative-cyclic analogue of Tsygan's formality conjecture. The source does not state a resolution status for this candidate, so it is recorded as open.

Sources & referencesView supporting material

Primary source

Alberto S. Cattaneo and Giovanni Felder, “Effective Batalin–Vilkovisky theories, equivariant configuration spaces and cyclic chains”, arXiv:0802.1706 (2008).

Additional references

3 papers in this index state this conjecture (1999–2008). The statement above is taken from the most recent of them; the others are arXiv:math/0504420, arXiv:math/9904132.

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