Alex Weekes

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math.RT2025

Shifted twisted Yangians and affine Grassmannian islices

Kang Lu, Weiqiang Wang, Alex Weekes

In a prequel we introduced the shifted iYangians $^{} Y_{μ}$ associated to quasi-split Satake diagrams of type ADE and even spherical coweights $μ$ , and constructed the iGKLO r…

math.RT2025

Shifted twisted Yangians of quasi-split ADE types

Kang Lu, Weiqiang Wang, Alex Weekes

Associated to all quasi-split Satake diagrams of type ADE and even spherical coweights $I^¼$ , we introduce the shifted iYangians $^{} Y_{I^} ¼$ and establish their PBW bases. We c…