The refined Adams conjecture for ABV-packets

From papers

Let G=G(Wn)G=G(W_n) and H±=H(Vm±)H^\pm=H(V_m^\pm) be members of the relevant classical dual-pair towers, and let ϕΦ(G)\phi\in\Phi(G). Define ϕα\phi_\alpha by

ϕα=(χWχV1cϕ)(i=0α1χWα12iS1).\phi_\alpha=(\chi_W\chi_V^{-1}\otimes{}^c\phi^\vee)\oplus\left(\bigoplus_{i=0}^{\alpha-1}\chi_W|\cdot|^{\frac{\alpha-1}{2}-i}\otimes S_1\right).

The refined Adams conjecture for ABV-packets. If πΠϕABV\pi\in\Pi_\phi^{\mathrm{ABV}}, then: (1) for α0\alpha\gg0, θα±(π)ΠϕαABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{\phi_\alpha}^{\mathrm{ABV}}; (2) if θα+(π)0\theta_{-\alpha}^+(\pi)\neq0, then θα±(π)ΠϕαABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{\phi_\alpha}^{\mathrm{ABV}}; (3) if θα±(π)ΠϕαABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{\phi_\alpha}^{\mathrm{ABV}} for some α\alpha, then θ(α+2)±(π)Πϕα+2ABV\theta_{-(\alpha+2)}^\pm(\pi)\in\Pi_{\phi_{\alpha+2}}^{\mathrm{ABV}}; (4) if θα±(π)ΠϕαABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{\phi_\alpha}^{\mathrm{ABV}}, then θα±(π)Π(ϕπ)αABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{(\phi_\pi)_\alpha}^{\mathrm{ABV}}; and (5), if πΠϕABVΠϕABV\pi\in\Pi_\phi^{\mathrm{ABV}}\cap\Pi_{\phi'}^{\mathrm{ABV}} with ϕCϕ\phi\geq_C\phi', then θα±(π)Π(ϕ)αABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{(\phi')_\alpha}^{\mathrm{ABV}} implies θα±(π)ΠϕαABV\theta_{-\alpha}^\pm(\pi)\in\Pi_{\phi_\alpha}^{\mathrm{ABV}}.

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Sources & referencesView supporting material

Primary source

Alexander Hazeltine, “Functoriality and the theta correspondence”, arXiv:2604.03095 (2026).

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