From: Ferruccio Guidi <ferruccio.guidi@unibo.it>
Date: Tue, 29 Jun 2021 16:31:37 +0000 (+0200)
Subject: update in ground and static_2
X-Git-Tag: make_still_working~141
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=dc605ae41c39773f55381f241b1ed3db4acf5edd;hp=dc605ae41c39773f55381f241b1ed3db4acf5edd;p=helm.git

update in ground and static_2

+ notation update for tail function
+ predefined virtuals: one symbol added
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