From: Ferruccio Guidi <fguidi@maelstrom.helm.cs.unibo.it>
Date: Sat, 19 Dec 2020 19:18:17 +0000 (+0100)
Subject: arithmetics for λδ
X-Git-Tag: make_still_working~169
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=df7a2aa19e98dc28e7f22129275a175cead49e2d;hp=df7a2aa19e98dc28e7f22129275a175cead49e2d;p=helm.git

arithmetics for λδ

we rebild the arithmetic library because lib/arithmetics/nat.ma has some problems:
- matitac does not compile it because of known time travel erropr
- too many indexed theorems make the search space explode during auto
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