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Nov 3, 2021 at 1:21 vote accept Dominic van der Zypen
Nov 2, 2021 at 20:10 answer added Louis D timeline score: 4
Nov 2, 2021 at 17:45 comment added bof For the "maximum" question see the discussion of $D(t,k,v)$ for $t=2$ in A. E. Brouwer, Packing and Covering of $\binom kt$-sets, Mathematical Centre Tracts 106 (1979), 89-97 for a comprehensive survey of what was known 40 years ago.
Nov 2, 2021 at 17:24 comment added bof Perhaps the maximum cardinality (a much investigated set packing problem) and the minimum cardinality should be two separate questions.
Nov 2, 2021 at 12:45 history asked Dominic van der Zypen CC BY-SA 4.0