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changed the proof 2014-06-17 503df74
Three typos

Thanks to Keenan Kidwell
http://stacks.math.columbia.edu/tag/07DR#comment-673
http://stacks.math.columbia.edu/tag/00JC#comment-674
http://stacks.math.columbia.edu/tag/00JL#comment-675
assigned tag 077G 2011-11-20 c348c9f
Tags: added new tags
created statement with label lemma-integral-closure-graded in algebra.tex 2011-10-24 a96dbc5
Integral closure and graded rings

	Came up in my lectures on commutative algebra. Of course this
	proof is a cheat, because some of the steps could be simplified
	if we use the fact that integral closure commutes with smooth
	base change.