2 citations · 2 across the 3 of their papers we have counts for
5 papers
Instantons on the Blown-up Surface and the Affine Vertex Algebra
Qingyuan Jiang, Wei-Ping Li, Yu Zhao
We answer a long-standing question raised by Vafa--Witten on a relation between S-duality and conformal field theory, which related Yoshioka's blow-up formula and the WZW model for…
Moduli Space of Sheaves and Categorified Commutator of Functors
Yu Zhao
We construct a weak categorification of the quantum toroidal algebra action on the Grothendieck group of moduli space of stable (or framed) sheaves over an algebraic surface, which…
The Wheel Conditions and K-theoretic Hall Algebras
Yu Zhao
In this note, we give a geometric realization of the wheel conditions initiated by Feigin-Odesskii through the K-theoretic Hall algebra on the affine plane.
The Degeneracy Loci for Smooth Moduli of Sheaves
Yu Zhao
Let S be a smooth projective surface over the complex field. Under certain technical assumptions, we prove that the degeneracy locus of the universal sheaf over the moduli space of…
Hilbert schemes on blowing ups and the free Boson
Yu Zhao
For different cohomology theories (including the Hochschild homology, Hodge cohomology, Chow groups, and Grothendieck groups of coherent sheaves), we identify the cohomology of mod…