Sense and Nonsense on Parton Distribution functions of the Photon

Abstract

The organization of finite order QCD approximations to $F_2^{\gamma }(x,Q^2)$ based on the separation of pure QED contribution from those of genuine QCD nature is discussed.

Comments: Talk given at the International Symposium PHOTON 2007, Paris, July 2007, 4 pages and 1 figure, references corrected