The Stacks project

Add reference Serre's criterion

Thanks to Ariyan Javanpeykar
https://stacks.math.columbia.edu/tag/031S#comment-2729

Try again

Use the new lemma as much as possible in the proof of Serre's criterion

Use previous lemma in proof Serre's criterion

Fix bad slogan.

Thanks to correction_bot
http://stacks.math.columbia.edu/tag/031R#comment-929

Cosmetic change

	Given a named theorem, such as Chevalley's theorem, we now code
	this as

	\begin{theorem}[Chevalley's theorem]
	\label{theorem-chevalley}

	and not as

	\begin{theorem}
	\label{theorem-chevalley}
	(Chevalley's Theorem.)

zerodivisor and nonzerodivisor

	Seems better this way.

LaTeX: \Spec

	Introduced the macro

	\def\Spec{\mathop{\rm Spec}}

	and changed all the occurences of \text{Spec} into \Spec.

Added new tags

	modified:   tags/tags

Small fix for error + nice little lemma characterizing normal rings with
finitely many minimal primes

	modified:   algebra.tex

Serre's criterion for normality

	modified:   algebra.tex