Fri, 03 Jun 2011 13:59:21 +0000 zhang added boolean grammar
Fri, 03 Jun 2011 13:54:14 +0000 zhang added
Thu, 02 Jun 2011 20:02:16 +0000 urbanc added a journal version
Thu, 02 Jun 2011 16:44:35 +0000 urbanc updated theories and itp-paper
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