The Evenness Conjecture for Real equivariant homotopy groups

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

η:GC2.\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,

πρ1G(MRη)=0.\pi^G_{*\rho-1}(M\mathbb{R}_\eta)=0.

When η\eta is trivial, this reduces to the known evenness of MUGMU_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.

Sources & referencesView supporting material

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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