7 papers
Quantized Coulomb Branches of Separated Cotangent Type and Orthosymplectic Quivers
Yaolong Shen, Changjian Su, Rui Xiong
We propose a definition of the quantized Coulomb branches of separated cotangent type, and prove that the corresponding classical construction recovers the non-cotangent Coulomb br…
Twisted Yangians and Steinberg varieties of type C
Changjian Su, Yang Yang
We study the equivariant homology of the generalized Steinberg variety of type C and show that there exists a surjective algebra homomorphism from the twisted Yangian of type $\AII…
Motivic Chern Classes of Open Projected Richardson Varieties and of Affine Schubert Cells
Changjian Su, Rui Xiong, Changlong Zhong
The open projected Richardson varieties are images of the open Richardson varieties of the complete flag variety under the canonical projection to the partial flag variety. Our mai…
Quivers with Involutions and Shifted Twisted Yangians via Coulomb Branches
Yaolong Shen, Changjian Su, Rui Xiong
To a quiver with involution, we study the Coulomb branch of the 3d involution-fixed part of the quiver gauge theory. We show that there is an algebra homomorphism…
Chern Classes of Open Projected Richardson Varieties and of Affine Schubert Cells
Neil J. Y. Fan, Peter L. Guo, Changjian Su +1
The open projected Richardson varieties form a stratification for the partial flag variety . We compare the Segre--MacPherson classes of open projected Richardson varieties wi…
Affine quantum groups and Steinberg varieties of type C
Changjian Su, Weiqiang Wang
We provide a geometric realization of the quasi-split affine quantum group of type AIII in terms of equivariant K-groups of non-connected Steinberg varieties…
A Pieri type formula for motivic Chern classes of Schubert cells in Grassmannians
Neil J. Y. Fan, Peter L. Guo, Changjian Su +1
We prove a Pieri formula for motivic Chern classes of Schubert cells in the equivariant K-theory of Grassmannians, which is described in terms of ribbon operators on partitions. Ou…