Mon, 04 Oct 2021 16:11:18 +0100 paulson merged
Mon, 04 Oct 2021 16:10:55 +0100 paulson removal of a redundant theorem (and white space)
Mon, 04 Oct 2021 12:32:50 +0100 paulson new material from the Roth development, mostly about finite sets, disjoint famillies and partitions
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