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History of tag 06N8

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changed the proof 2011-08-13 4ea0b65
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assigned tag 06N8 2011-06-15 2aa1b6c
Tags: Added new tags
created statement with label lemma-amelioration-unique in categories.tex 2011-06-07 fcc2791
Amelioration of maps of cats fibred in groupoids

	If X ---> Y is a 1-morphism of cats fibred in groupoids over a
	category C then there is a replacement of X which is fibred in
	groupoids over Y and equivalent to X. Moreover this has a
	certain uniqueness. See actual text for details.