  Katsnelson submitted his Comment on our paper "Projective Quantum Monte Carlo
Method for the Anderson Impurity Model and its Application to Dynamical Mean
Field Theory" to Phys. Rev. Lett. in May 2005. We proved in our report that
this comment was incorrect since there is no orthogonality catastrophe for our
calculation in Phys. Rev. Lett. 93, 136405 (2004) which is for half-filling.
Now in cond-mat/0508763, Katsnelson incorporates our proof of the invalidity of
his original Comment, based on Friedel's sum rule.
  Instead, he now claims that the projective quantum Monte Carlo method is
"unpractical" off half-filling, overlooking that our calculations off
half-filling (R. Arita and K. Held, LT24 conference proceedings and
cond-mat/0508639) employ in practice a noninteracting trial Hamiltonian with
the same electron density as the interacting Hamiltonian so that there is again
no orthogonality catastrophe.
  Note added. In the revised version of his comment, Katsnelson gives proper
credit to our proof. In our reply, we will present the original proof based on
the Friedel sum rule. Moreover, we show that the orthogonality catastrophe does
not affect our results. Katsnelson's objection is not valid.
