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Partially ordered set
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== Number of partial orders == Sequence [{{fullurl:OEIS:A001035}} A001035] in [[On-Line Encyclopedia of Integer Sequences|OEIS]] gives the number of partial orders on a set of ''n'' labeled elements: {{Number of relations}} The number of strict partial orders is the same as that of partial orders. If the count is made only [[up to]] isomorphism, the sequence 1, 1, 2, 5, 16, 63, 318, ... {{OEIS|A000112}} is obtained.
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