Given the ring $ R = \mathbb{Q}[[x_1, \dots, x_n]]$ and a prime ideal $ \mathfrak{p}$ of $ R$ , I would like to be able to say whether or not $ R / \mathfrak{p}$ is integrally closed. In particular, I’d like to know what conditions on $ \mathfrak{p}$ guarantee that $ R/\mathfrak{p}$ is an integrallyRead more