Paper/Paper.thy
2011-02-15 urbanc updated paper
2011-02-14 urbanc updated
2011-02-14 urbanc updated paper
2011-02-14 urbanc updated
2011-02-11 urbanc included comments by Xingyuan
2011-02-10 urbanc simplified a bit the proof
2011-02-10 urbanc more things
2011-02-10 urbanc latest on the paper
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