Geometric comparison of complex and pp-adic Arthur–Vogan packets

From papers

Let nn, rr, kik_i, and mim_i be as above, and let ψ\BR\psi^\BR denote the corresponding parameter on the complex side. On the pp-adic side, let ψp\psi^p and the Arthur–Vogan packets ΠψpA-V\Pi_{\psi^p}^{\text{A-V}} be as defined above. Geometric comparison conjecture. When nn is even, there is a bijection

Πψ\BRA-V\bijectsΠψpA-V.\Pi_{\psi^\BR}^{\text{A-V}} \bijects \Pi_{\psi^p}^{\text{A-V}}.

When nn is odd, there is a bijection

p+q=npn12mod2Πψ\BR\bU(p,q)\bijectsΠψpA-V.\bigsqcup_{\substack{ p + q = n\\ p \equiv \frac{n-1}{2} \, {\rm mod} \, 2 }} \Pi_{\psi^\BR}^{\bU(p,q)} \bijects \Pi_{\psi^{p}}^{\text{A-V}}.

This proposes a direct comparison between the complex and pp-adic Arthur–Vogan packets, with the parity of nn determining whether one complex packet or a disjoint union over unitary groups occurs. The source provides no resolution, so the conjecture remains open.

Progress summary

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Sources & referencesView supporting material

Primary source

Taiwang Deng, Chang Huang, Bin Xu and Qixian Zhao, “On a geometric comparison of representations of complex and p-adic GL_n”, arXiv:2504.15653 (2026).

Solutions 0

No solutions have been posted yet.