From: Adam Megacz <megacz@cs.berkeley.edu>
Date: Mon, 23 May 2011 06:55:56 +0000 (-0700)
Subject: NaturalDeduction: add nd_exch
X-Git-Url: http://git.megacz.com/?p=coq-hetmet.git;a=commitdiff_plain;h=4ec2860679a25b16cba9df2de6ea971064200756;hp=4ec2860679a25b16cba9df2de6ea971064200756

NaturalDeduction: add nd_exch
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