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Witnessing differences without redundancies
Authors:Franco Parlamento   Alberto Policriti   K. P. S. B. Rao
Affiliation:Dipartimento di Matematica e Informatica, Università di Udine, Via delle Scienze 204, 33100 Udine--Italy ; Dipartimento di Matematica e Informatica, Università di Udine, Via delle Scienze 204, 33100 Udine--Italy ; Indian Statistical Institute Bangalore, 8th mile Mysore Road, R.V. College Post, Bangalore 560 059
Abstract:We show that $: n-1 :$ elements suffice to witness the differences of $: n :$ pairwise distinct sets, and provide sufficient conditions for an infinite family of pairwise distinct sets to have a minimal collection of elements witnessing the differences between any two of its members.

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