Dadi Ni

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math.SG2026

Affine deformations of cotangent groupoids

Dadi Ni, Kaichuan Qi

We study affine deformations of the cotangent groupoid $T^{*} G ⇉ A^{*}$ , governed by a one-form $γ \in Ω^{1} (G^{(2)})$ , and characterize the conditions o…

math.SG2026

An Explicit Construction of $S^{1}$ -Gerbes over the Stack $[G / G]$

Dadi Ni, Kaichuan Qi

For a compact and connected Lie group $G$ , we present an explicit construction of an $S^{1}$ -gerbe over the differentiable stack $[G / G]$ in the framework of $S^{1}$ -c…

Affine deformations of cotangent groupoids

An Explicit Construction of S1-Gerbes over the Stack [G/G]

An Explicit Construction of $S^{1}$ -Gerbes over the Stack $[G / G]$