2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51207Some problems related to the structure of higher terms of the epsilon-expansion of Feynman diagrams are discussed.11 pages, LaTeX, contribution to the Proceedings of CPP2001 (Tokyo, Japan, November 2001)High Energy Physics - TheoryGeometrical approach to loop calculations and the epsilon-expansion of Feynman diagramstext