The Stacks project

Try to use L/K notation for field extensions

We could also try to consistenly use "field extension" and not just
"extension" and consistently use "ring extension", etc.

Be more careful about Jacobson radical

Thanks to Brian Conrad
https://stacks.math.columbia.edu/tag/0AMD#comment-3650
https://stacks.math.columbia.edu/tag/0CT7#comment-3651
https://stacks.math.columbia.edu/tag/0BC6#comment-3652
https://stacks.math.columbia.edu/tag/0D48#comment-3653

Remove 'f.f.'

Sad IMHO.

Thanks to BCnrd, Dario Weissmann, and sdf
https://stacks.math.columbia.edu/tag/02JQ#comment-2762
https://stacks.math.columbia.edu/tag/02JQ#comment-2765
https://stacks.math.columbia.edu/tag/02JQ#comment-2766
https://stacks.math.columbia.edu/tag/02JQ#comment-2767

Fix references to point to the results moved to fields.tex

A bit more about Galois theory

We've so far considered all field theory to be part of the basic
requisites for the Stacks project. But we could have a bit more
detail in the presentation of this material.

LaTeX: \Spec

	Introduced the macro

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

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

End conversion of etale to \'etale.

Added new tags

More on generic fibres.

	Slight improvement of exposition + additional material on the
	relationship between coarse properties (irreducible, connected)
	of the generic fibre and nearby fibres.