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changed the statement and the proof 2021-07-27 eba31f1
Fix an element of an ideal

Since the ideal J' is an ideal of the ring A_(f_0), its element should be of degree 0, i.e. the element g should be g/f_0^e.
changed the proof 2012-08-21 ce10c3e
Blowing up for algebraic spaces, part II
assigned tag 0801 2012-07-19 764591f
Tags: Added new tags
created statement with label lemma-closed-subscheme-proj in divisors.tex 2012-07-12 95d9498
Composition admissible blowups

	This commit also includes some really basic material on relative
	proj which was so far missing from the project. Probably because
	we haven't found a way to present this material in a good way.