Le probl\`eme intensionnel de la quantification chez Hilbert (The intensional problem of quantification in Hilbert)

The paper (in French) presents a survey of Hilbert’s Epsilon operator focusing on the intensional aspects of its semantics. It comments on some epistemological problems, from Albert Lautman in the 1930s to John Bell, Grigori Mints, Barry Hartley Slater, Richard Zach or Edward Zalta in the 1990s.