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

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 Bι\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

Bι(ch(M+)ΩB(sLieE)(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))Bι(ch(M+)ΩB(sLieE)(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 ΩBEnu\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(LiedE)\operatorname{\Omega B}(\mathsf{Lie}_d\otimes\mathcal{E})-module structure. The source presents it conditionally on constructing that extension and gives no resolution.

Sources & referencesView supporting material

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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