From: Ferruccio Guidi <ferruccio.guidi@unibo.it>
Date: Fri, 29 Nov 2013 16:33:57 +0000 (+0000)
Subject: addition for natural numbers with infinity
X-Git-Tag: make_still_working~1040
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=b3f8b89278d193ed0aa0f39e7f8d74cf1de81d8d;hp=b3f8b89278d193ed0aa0f39e7f8d74cf1de81d8d;p=helm.git

addition for natural numbers with infinity
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