The J-homomorphism conjecture on cohomology indecomposables

Let JJ be the JJ-homomorphism, let βj\beta_j denote the indicated cohomology classes associated with SOSO, and let obreakγ1[1],γ1[2],γ2[1] obreak\gamma_{1[1]},\gamma_{1[2]},\gamma_{2[1]} denote the cohomology indecomposable generators in the Nakaoka-module presentation used in the paper. J-homomorphism conjecture. The induced map on cohomology indecomposables satisfies

γ1[1]2k+1β2k+1\gamma_{1[1]}^{2k+1}\mapsto\beta_{2k+1} γ1[2]iγ2[1]β2i+3\gamma_{1[2]}^{i}\gamma_{2[1]}\mapsto\beta_{2i+3}

and all other indecomposables map to 00. The displayed formulas are supported by calculations through degree 1515, but the general assertion is presented as a conjecture.

Sources & referencesView supporting material

Primary source

Dana Hunter, “The Curtis-Wellington spectral sequence through cohomology”, arXiv:2111.01770 (2021).

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