2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168024In the first part of this text, we define motivic Artin L-fonctions via a motivic Euler product, and show that they coincide with the analogous functions introduced by Dhillon and Minac. In the second part, we define under some assumptions a motivic Tamagawa number and show that it specializes to the Tamagawa number introduced by Peyre in the context of Manin's conjectures about rational points of bounded height on Fano varieties.in frenchAlgebraic GeometryNumber Theory14G10 14C35 (11M41 12E30 14J45)text