The stronger twisted coalgebra conjecture in right Ed\mathbb{E}_d-modules

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Let MM be a simply connected parallelizable manifold of finite type and dimension dd. Let ch⁡(FMM)\operatorname{ch}(\mathsf{FM}_M), M+M^+, I\mathcal{I}, Tw⁡\operatorname{Tw}, and B⁡ι\operatorname{B}_\iota be as above, and let Ed\mathbb{E}_d be a model of the little-dd-disks operad. The source gives a zig-zag of quasi-isomorphisms from ch⁡(FMM)\operatorname{ch}(\mathsf{FM}_M) to

B⁡ι(ch⁡∗(M+)⊗ΩB⁡(sLie⊗E)∘(sdI)).\operatorname{B}_\iota\bigl(\operatorname{ch}^*(M^+)\otimes\operatorname{\Omega B}(\mathsf{sLie}\otimes\mathcal{E})\circ(s^d\mathcal{I})\bigr).

Stronger twisted coalgebra conjecture. For some model of the Ed\mathbb{E}_d operad, this zig-zag can be promoted to a zig-zag of equivalences

Tw⁡(ch⁡(FMM))≃B⁡ι(ch⁡∗(M+)⊗ΩB⁡(sLie⊗E)∘(sdI)),\operatorname{Tw}(\operatorname{ch}(\mathsf{FM}_M))\simeq\operatorname{B}_\iota\bigl(\operatorname{ch}^*(M^+)\otimes\operatorname{\Omega B}(\mathsf{sLie}\otimes\mathcal{E})\circ(s^d\mathcal{I})\bigr),

of twisted ΩB⁡Enu\operatorname{\Omega B}\mathcal{E}^{\mathrm{nu}}-coalgebras in right Ed\mathbb{E}_d-modules.

This strengthens the preceding conjecture by requiring a full right Ed\mathbb{E}_d-module structure rather than only the right ΩB⁡(Lied⊗E)\operatorname{\Omega B}(\mathsf{Lie}_d\otimes\mathcal{E})-module structure. The source presents it conditionally on constructing that extension and gives no resolution.

References

Primary source

Najib Idrissi and Victor Roca i Lucio, “Homology of configuration spaces in positive characteristic via point-set constructions”, arXiv:2606.26802 (2026).

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