The conformal gauge to the derivative gauge for worldsheet gravity
  The BRST quantizations of worldsheet gravity corresponding to final more acceptable derivative gauge and the standard conformal gauge are studied. We establish a mapping between these two gauges utilizing FFBRST formulation in standard way. Therefore, we are able to declare that the problems associated with Virasoro constraints are the gauge artifact. 
Sudhaker Upadhyay
gr-qc hep-th