Quiver ${\text{W}}_{{\epsilon }_1,{\epsilon }_2}$ algebras of 4d $\mathcal{N}=2$ gauge theories

Fabrizio Nieri, Yegor Zenkevich

We construct an $\epsilon$-deformation of W algebras, corresponding to the additive version of quiver ${\text{W}}_{q,t^{-1}}$ algebras which feature prominently in the 5d version of the BPS…