Definition 16.2.1 (07C5)—The Stacks project

Processing math: 100%

Definition 16.2.1. Let $R \to A$ be a ring map. The singular ideal of $A$ over $R$ , denoted $H_{A/R}$ is the unique radical ideal $H_{A/R} \subset A$ with

$V(H_{A/R}) = \{ \mathfrak q \in \mathop{\mathrm{Spec}}(A) \mid R \to A \text{ not smooth at }\mathfrak q\}$

Comments (0)

There are also:

4 comment(s) on Section 16.2: Singular ideals

In your comment you can use Markdown and LaTeX style mathematics (enclose it like $\pi$ ). A preview option is available if you wish to see how it works out (just click on the eye in the toolbar).

Comments (0)

Post a comment