scientific article

zbMath0741.05001MaRDI QIDQ3972132

Gyula O. H. Katona, Péter P. Pálfy, Janos Demetrovics

Publication date: 25 June 1992

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

number of unions

Mathematics Subject Classification ID

Exact enumeration problems, generating functions (05A15) Permutations, words, matrices (05A05)

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The poset of closures as a model of changing databases

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