Un diagramme de Feynman comprend des pointes, appelées vertices, et des lignes attachées aux sommets.
Un diagramme de Feynman a des lignes de diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes diffÃ © rentes formes.