4 citations · 17 across the 16 of their papers we have counts for
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Hopf algebroids and secondary characteristic classes
Jerome Kaminker, Xiang Tang
We study a Hopf algebroid, $\calh$, naturally associated to the groupoid . We show that classes in the Hopf cyclic cohomology of $\calh$ can be used to define sec…
A universal deformation formula for Connes-Moscovici's Hopf algebra without any projective structure
Xiang Tang, Yijun Yao
We construct a universal deformation formula for Connes-Moscovici's Hopf algebra without any projective structure using Fedosov's quantization of symplectic diffeomorphisms.
Equivariant Lefschetz number of differential operators
G. Felder, X. Tang
Let be a compact Lie group acting on a compact complex manifold . We prove a trace density formula for the -Lefschetz number of a differential operator on . We general…
Quantization of Poisson-Hopf stacks associated with group Lie bialgebras
Gilles Halbout, Xiang Tang
Let be a Poisson Lie group and $\g$ its Lie bialgebra. Suppose that $\g$ is a group Lie bialgebra. This means that there is an action of a discrete group on deforming t…