Article Dans Une Revue Acta Scientiarum Mathematicarum Année : 2007

Embedding coproducts of partition lattices

Résumé

We prove that the lattice Eq(X) of all equivalence relations on an infinite set X contains, as a 0,1-sublattice, the 0-coproduct of two copies of itself, thus answering a question by G.M. Bergman. Hence, by using methods initiated by de Bruijn and further developed by Bergman, we obtain that Eq(X) also contains, as a sublattice, the coproduct of 2^{card(X)} copies of itself.

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Dates et versions

hal-00175368 , version 1 (27-09-2007)
hal-00175368 , version 2 (15-10-2007)

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Friedrich Wehrung. Embedding coproducts of partition lattices. Acta Scientiarum Mathematicarum, 2007, 73, pp.429--443. ⟨hal-00175368v2⟩
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