2012-02-22 urbanc partially updated conference paper; slightly tuned journal paper
2012-02-20 urbanc some polishing of the repository
2012-02-16 urbanc one typo
2012-02-14 urbanc changes by Xingyuan
2012-02-14 urbanc changed
2012-02-14 urbanc live
2012-02-14 urbanc live
2012-02-14 urbanc draft
2012-02-14 urbanc draft
2012-02-14 urbanc key lemma
2012-02-14 urbanc fixed 1st paragraph
2012-02-14 urbanc 1st paragraph
2012-02-13 urbanc 1st paragraph
2012-02-13 urbanc polished implementation
2012-02-13 zhang Line numbers added.
2012-02-13 urbanc conclusion done
2012-02-13 urbanc more conclusion
2012-02-13 urbanc more conclusion
2012-02-13 urbanc more conclusion
2012-02-13 urbanc more conclusion
2012-02-13 urbanc some parts of the conclusion
2012-02-13 urbanc proof idea
2012-02-13 urbanc added implementation section
2012-02-13 urbanc merged Xingyuan's changes
2012-02-13 urbanc polished
2012-02-13 urbanc more on the paper
2012-02-13 urbanc more on the paper
2012-02-13 urbanc assumptions
2012-02-13 urbanc some polishing
2012-02-12 urbanc some polishing
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