Rationalization as a Bousfield localization

Example 21.8.2 (Rationalization). The inclusion \(\Vect _{\Q } \hookrightarrow \Ab \) of rational vector spaces into abelian groups admits a left adjoint \[ \Q \otimes _{\Z } -\colon \Ab \to \Vect _{\Q }, \] called the rationalization functor. It is a Bousfield localization.