2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18439The relation between "non-perturbative analysis" of low temperature dephasing and the perturbation theory is discussed. Contributions missed in each order of the perturbation theory due to "non-perturbative analysis" are listed. Main source of the mistake is pointed out.4 pages, 3 figuresCondensed MatterComment on PRB 59, 9195 (1999) and 62, 14061 (2000) by D. S. Golubev and A. D. Zaikin, and on cond-mat/0110495 by D.S. Golubev, A.D. Zaikin, and Gerd Schöntext