From: Ralf Jung <post@ralfj.de>
Date: Wed, 15 Jul 2020 11:43:14 +0000 (+0200)
Subject: link to 'two kinds of invariants'
X-Git-Url: https://git.ralfj.de/web.git/commitdiff_plain/b91b3d141fdbdf9c913e620d0701ae9a95dca7e8?hp=b91b3d141fdbdf9c913e620d0701ae9a95dca7e8

link to 'two kinds of invariants'
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