General recursion relations for higher-point spectrally flowed correlators

Derive general recursion relations for n-point (n>3) worldsheet correlation functions with spectrally flowed insertions in the SL(2,R) WZW model on AdS3, extending the local Ward-identity approach and formulating the relations in the y-basis as differential equations that can be solved for generic spectral flow data.

Background

Using local Ward identities, the paper derives a system of constraints that become recursion relations among spectrally flowed primary correlators and their h-shifted counterparts. This program is completed for three-point functions (and partially for four-point functions), but a general derivation for higher-point n remains unavailable. Developing these recursions in full generality, ideally cast as y-basis differential equations, would systematically determine flowed higher-point correlators.