The v_2-local injectivity conjecture for the algebraic tmf resolution

Let tmf\mathrm{tmf} be the connective topological modular forms spectrum, let tmf\overline{\mathrm{tmf}} denote its cofiber in the unit decomposition, and let \prescriptassE2s,t()\prescript{\mathrm{ass}}{}{E}^{s,t}_2(-) denote the mod 22 Adams spectral sequence. For the sphere spectrum, consider the algebraic tmf\mathrm{tmf}-resolution terms

\prescriptassE2s,t(tmftmfn).\prescript{\mathrm{ass}}{}{E}^{s,t}_2(\mathrm{tmf} \wedge \overline{\mathrm{tmf}}^{n}).

Here v21()v_2^{-1}(-) denotes localization at the chromatic periodicity element v2v_2. The v_2-local injectivity conjecture. The map

\prescriptassE2s,t(tmftmfn)v21\prescriptassE2s,t(tmftmfn)\prescript{\mathrm{ass}}{}{E}^{s,t}_2(\mathrm{tmf} \wedge \overline{\mathrm{tmf}}^{n}) \longrightarrow v_2^{-1}\prescript{\mathrm{ass}}{}{E}^{s,t}_2(\mathrm{tmf} \wedge \overline{\mathrm{tmf}}^{n})

is injective for s>0s>0. This would make the algebraic tmf\mathrm{tmf}-resolution more accessible through its v2v_2-localization, analogous to corresponding results for the bo\mathrm{bo}- and BP2BP\langle 2\rangle-resolutions; the source presents it as a proposed conjecture, and no resolution is supplied here.

Sources & referencesView supporting material

Primary source

Mark Behrens, Prasit Bhattacharya and Dominic Culver, “The structure of the v_2-local algebraic tmf resolution”, arXiv:2301.11230 (2025).

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