2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/157037This is a comment to hep-th/0703243. The paper determined the relaxation time tau_pi of the shear viscous stress for the N=4 SYM from AdS/CFT correspondence. The purpose of this comment is to point out that the value of tau_pi is 3 times larger than their result if one takes into account an additional term in the hydrodynamic equation.2 pages, ReVTeX4High Energy Physics - TheoryHigh Energy Physics - PhenomenologyNuclear Theorytext