2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75141Given a Klein surface Y, there is a unique symmetric Riemann surface X being the complex double of Y. In this paper we shall show that the situation is not the same when we work in the category of surfaces with nodes.16 pagesComplex VariablesGeometric Topology32G15 (Primary); 30F50; 32G13; 14H15 (secondary)text