2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/61024It is proved that classifiable simple separable nuclear purely infinite C*-algebras having finitely generated K-theory and torsion-free K_1 are semiprojective. This is accomplished by exhibiting these algebras as C*-algebras of infinite directed graphs.Expanded introduction and bibliography noting other related work. 28 pages, 3 figuresOperator AlgebrasPrimary 46L05, 46L80. Secondary 46L85, 22A22text