A perturbative CFT dual for pure NS–NS AdS₃ strings

We construct a CFT dual to string theory on AdS$_3$ with pure NS-NS flux. It is given by symmetric orbifold of linear dilaton deformed marginal operator from the twist-2 sector. compute two- and three-point functions side 4th order in conformal perturbation at large $N$. They agree computation genus 0, thus providing ample evidence for duality. also show that full spectra both short long strings match. The duality should be understood as perturbative $N^{-1}$.