From: Ferruccio Guidi <ferruccio.guidi@unibo.it>
Date: Mon, 2 Dec 2019 12:42:43 +0000 (+0100)
Subject: updated web site
X-Git-Tag: make_still_working~215
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=cdb85e803cd6038352ec0a318285f96f42faf02d;hp=cdb85e803cd6038352ec0a318285f96f42faf02d;p=helm.git

updated web site

+ new preprint J2a
+ some improvements
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