Gómez Sánchez A., Luis2017-09-252017-09-251999http://revistas.pucp.edu.pe/index.php/promathematica/article/view/8148/8443El artículo no presenta resumenAn old conjecture still unproved says that on Z every number is a sum of four cubes. We show here that this is so on Q.application/pdfspainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0Teoría de los NúmerosMatemáticasinfo:eu-repo/semantics/articlehttps://purl.org/pe-repo/ocde/ford#1.01.00