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History of tag 0C6N

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type time link
changed the proof 2017-07-04 341ee80
Largish set of changes to curves

Tried to say something intelligent about nodal curves without every base
changing to the algebraic closure... this may have been a mistake, but I
am still somewhat happy about it so far.

Next up: stable curves as contractions of nodal ones
changed the proof 2016-04-02 065d226
Characterization P^1_k
assigned tag 0C6N 2016-04-01 936b790
Tags: Added new tags
created statement with label lemma-genus-zero in curves.tex 2016-03-29 1548eb1
Proper genus zero curves are conics