A linear version of Dawson-G\"artner's theorem

We prove a linear version of Dawson-G\"artner's theorem saying that weak large deviations principles and the equivalence of ensembles are preserved through linear projective limits. ----- Nous d\'emontrons une version lin\'eaire du th\'eor\`eme de Dawson-G\"artner assurant que les principes de grandes d\'eviations faibles et l'\'equivalence d'ensemble sont conserv\'es par passage aux limites projectives d'espaces vectoriels.