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History of tag 04PR

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type time link
assigned tag 04PR 2010-06-02 90566d1
Added new tags
created statement with label definition-pure-ideal in algebra.tex 2010-06-02 1369213
Pure ideals

	Added a section to the algebra chapter on pure ideals. An ideal
	is pure when the quotient of the ring by it is flat. Pure ideals
	correspond 1-1 with closed subsets which are stable under
	generalizations.