The Evenness Conjecture for Real equivariant homotopy groups

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Let GG be a compact quasi-abelian Lie group equipped with an augmentation

η:G⟶C2.\eta:G\longrightarrow C_2.

Write ρ\rho for the relevant regular representation and MRηM\mathbb{R}_\eta for the associated Real equivariant spectrum. Evenness Conjecture. For every such augmented group,

π∗ρ−1G(MRη)=0.\pi^G_{*\rho-1}(M\mathbb{R}_\eta)=0.

When η\eta is trivial, this reduces to the known evenness of MUG∗MU_G^* for abelian compact Lie groups. The conjecture would imply that the split surjection from the Real global group law to the ordinary global group law is an isomorphism; it is proposed as an ingredient for proving the Hu–Kriz map result and remains open in the source.

References

Primary source

Jack Carlisle, Noah Wisdom and Guoqi Yan, “Real Global Group Laws and Hu-Kriz Maps”, arXiv:2501.05469 (2025).

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