Study of the systematic errors in the calculation of renormalization   constants of the topological susceptibility on the lattice
  We present a study of the systematic effects in the nonperturbative evaluation of the renormalization constants which appear in the field-theoretical determination of the topological susceptibility in pure Yang-Mills theory. The study is performed by computing the renormalization constants on configurations that have been calibrated by use of the Ginsparg-Wilson formalism and by cooling. 
B. Alles (INFN Pisa), M. D'Elia (U. Genova), A. Di Giacomo (U. Pisa),   C. Pica (U. Pisa)