From: Ferruccio Guidi <ferruccio.guidi@unibo.it>
Date: Sun, 6 Nov 2022 18:24:03 +0000 (+0100)
Subject: update in ground
X-Git-Tag: make_still_working~29
X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=commitdiff_plain;h=8f1a123e61ff079b1f9ad63cc915470ec7e6abf3;hp=8f1a123e61ff079b1f9ad63cc915470ec7e6abf3

update in ground

+ additions to subset extensionality
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