On renormalization of Poisson-Lie T-plural sigma models
  Covariance of the one-loop renormalization group equations with respect to Poisson-Lie T-plurality of sigma models is discussed. The role of ambiguities in renormalization group equations of Poisson-Lie sigma models with truncated matrices of parameters is investigated. 
Ladislav Hlavaty, Josef Navratil, Libor Snobl
hep-th