The Stacks project

Added reference to guide.tex

Thanks to AAK
https://stacks.math.columbia.edu/tag/04V1#comment-4317

Add references

Thanks to Takumi Murayama
https://stacks.math.columbia.edu/tag/02JY#comment-3546

Fix reversal of names

Thanks to Ko Aoki
https://stacks.math.columbia.edu/tag/02JY#comment-2873

amalg and coprod

LaTeX: \Spec

	Introduced the macro

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

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

Specializing, Generizing and Submersive morphisms

	Introduced the terminology listed above, as suggested by David
	Rydh. In EGA I (new edition) they use g\'en\'erisant and I guess
	the english form is indeed generizing, but I still have to get
	used to it.

	Also added: Lemma stating that every open morphism of schemss is
	generizing which was missing (David Rydh).

Topology + Morphisms: Fix error in topology lemma + fallout

	The error was in thinking that generalizations lift along any
	open map of topological spaces, which they do not. An example
	can be constructed relatively easily.

	It turns out that we never used this anywhere in the rest of the
	chapters, which is a lucky break. We fixed a comment about this
	in the chapter on morphisms of schemes to be a little more
	clear, and we added a lemma stating explicitly that
	generalizations do lift along flat morphisms of schemes.

Added new tags to the file tags/tags

	modified:   tags/tags

Descending properties of morphisms and related lemmas

	modified:   algebra.tex
	modified:   fpqc-descent.tex
	modified:   morphisms.tex