The Stacks project

Make uniform usage of \text{id}

Whitespace changes

LaTeX: \Ob

	Introduced a macro

	\def\Ob{\mathop{\rm Ob}\nolimits}

	and replaced any occurence of \text{Ob}( with \Ob(. There are
	still some occurences of \text{Ob} but these are sets, not the
	operator that takes the set of objects of a category.

LaTeX: \Mor

	Introduced a macro

	\def\Mor{\mathop{\rm Mor}\nolimits}

	and replaced all the occurences of \text{Mor} with \Mor.

Clarification on stacks associated to presheaves

	Added a separate example for the case where you start with a
	presheaf of sets and take the associated category fibred in
	sets. Also some small snafu's corrected.

Added new tags to the project

	modified:   tags/tags

Hopefully enough for a while on (abstract) stacks

	modified:   categories.tex
	modified:   stacks.tex