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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 associated to quasi-split Satake diagrams of type ADE and even spherical coweights , and constructed the iGKLO r…
math.QA2025
Shifted twisted Yangians and finite -algebras of classical type
Kang Lu, Yung-Ning Peng, Lukas Tappeiner +2
We introduce parabolic presentations of twisted Yangians of types AI and AII, interpolating between the R-matrix presentation and the Drinfeld presentation. Then we formulate and p…