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arxiv: 1809.06435 · v1 · pith:P4XWNKWAnew · submitted 2018-09-17 · 🧮 math.LO · math.CO

The Hrushovski property for hypertournaments and profinite topologies

classification 🧮 math.LO math.CO
keywords answercasedisjointgeneralizedhypertournamentsisomorphismspairwisepartial
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We study the problem of extending partial isomorphisms for hypertournaments, which are relational structures generalizing tournaments. This is a generalized version of an old question of Herwig and Lascar. We show that the generalized problem has a negative answer, and we provide a positive answer in a special case. As a corollary, we show that the extension property holds for tournaments in case the partial isomorphisms have pairwise disjoint ranges and pairwise disjoint domains.

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