Sv. Kryukov, AN ANALOG OF THE QUANTUM DRINFELD-SOKOLOV HAMILTONIAN REDUCTION FOR DEFORMED ALGEBRAS - THE U-Q((SL)OVER-CAP(2)) CASE, Theoretical and mathematical physics, 114(3), 1998, pp. 266-275
We investigate the relation between the algebra U-q(<(sl)over cap>(2))
and the q-deformation of the Virasoro algebra. We calculate the BRST
operator of the Drinfeld-Sokolov reduction and its cohomology.