The Stacks project

Lemma 15.52.2. Any localization of a finite type ring over a (quasi-)excellent ring is (quasi-)excellent.

Proof. For finite type algebras this follows from the definitions for the properties J-2 and universally catenary. For G-rings, see Proposition 15.50.10. We omit the proof that localization preserves (quasi-)excellency. $\square$

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