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but that could be made comparable without requiring any other changes to the partial order.
283:
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304:, Johns Hopkins Series in Mathematical Sciences, Baltimore: Johns Hopkins Univ. Press
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of linear extensions is a realizer if and only if it reverses every critical pair.
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be a partially ordered set. Then a critical pair is an ordered pair
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is added, the addition does not cause any violations of the
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is a critical pair, then the binary relation obtained from
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Combinatorics and partially ordered sets: Dimension theory
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Hasse diagram of a partial order with a critical pair ⟨
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270:if there exists a linear extension in
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300:Trotter, W. T. (1992),
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