Conjecture on intermediate differentials in the genuine C2C_2-equivariant Adams spectral sequence

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Let MM denote the algebraic Mahowald invariant for the 2-primary Adams spectral sequence. For integers jj and kk with j≫k>0j\gg k>0, let s(k)s(k) and c(k)c(k) be the stem and coweight of M(h0k)M(h_0^k), respectively. The relevant values are

ks(k)c(k)4n+18n+14n4n+28n+24n4n+38n+34n4n+48n+74n+3\begin{array}{c|c|c} k&s(k)&c(k)\\ \hline 4n+1&8n+1&4n\\ 4n+2&8n+2&4n\\ 4n+3&8n+3&4n\\ 4n+4&8n+7&4n+3 \end{array}

Intermediate-differential conjecture. For j≫k>0j\gg k>0,

dk+1(θρ2j−k+s(k)τ2j−1)=θτ2j+2j−k−1+c(k)−1M(h0k)hj−k.d_{k+1}\left(\frac{\theta}{\rho^{2^{j-k}+s(k)}\tau^{2^j-1}}\right)=\frac{\theta}{\tau^{2^j+2^{j-k-1}+c(k)-1}}M(h_0^k)h_{j-k}.

This conjecture predicts a family of major intermediate differentials in the genuine C2C_2-equivariant Adams spectral sequence, extending the low-dimensional calculations discussed in the paper. Its status is unclear from the supplied text, so it remains open pending further verification.

References

Primary source

Manyi Guo, Guchuan Li, Yunze Lu, Sihao Ma, Yuchen Wu, Zhouli Xu, Albert Jinghui Yang and Shangjie Zhang, “A Hurewicz Theorem for RO(C_2)-graded Equivariant Homology Governed by Vector Fields on Spheres”, arXiv:2605.26334 (2026).

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