2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64631In this article we classify the complex quadratic number fields k with 2-class group of type (2,2,2) whose Hilbert 2-class fields have a 2-class group of rank 2, and then determine the length of their 2-class field towers.Number TheoryImaginary quadratic fields with Cl_2(k) = (2,2,2)text