2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/159187The self-similar functions of zero spectral degree are defined. The singular points of these functions are investigated and full classification of points is given. The connection with spectral problems (Stieltjes string) is pointed out.11 pages, 4 figuresFunctional Analysis26A30The singular points of self-similar functions with zero spectral degree. Stieltjes self-similar stringtext