Draw the Hasse diagram for a poset P satisfying the following conditions (and justify that they are satisfied): • Pis graded. • P is not rank-unimodal. (Note that a poset satisfying po ≤ P ≤ --- < Pa or Po≥ P₁ ≥ 2 Pa is considered to be rank-unimodal). • P is not rank-symmetric. • P does not satisfy the Sperner property. • There does not exist a poset P' satisfying the first 4 conditions whose rank is smaller than the rank of P. For any added challenge, find (with proof) the minimal order (number of elements) of a poset satisfying these conditions.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Draw the Hasse diagram for a poset P satisfying the following conditions (and justify that
they are satisfied):
• Pis graded.
• P is not rank-unimodal. (Note that a poset satisfying po ≤ P ≤ --- < Pa or
Po≥ P₁ ≥ 2 Pa is considered to be rank-unimodal).
• P is not rank-symmetric.
• P does not satisfy the Sperner property.
• There does not exist a poset P' satisfying the first 4 conditions whose rank is smaller
than the rank of P.
For any added challenge, find (with proof) the minimal order (number of elements) of a
poset satisfying these conditions.
Transcribed Image Text:Draw the Hasse diagram for a poset P satisfying the following conditions (and justify that they are satisfied): • Pis graded. • P is not rank-unimodal. (Note that a poset satisfying po ≤ P ≤ --- < Pa or Po≥ P₁ ≥ 2 Pa is considered to be rank-unimodal). • P is not rank-symmetric. • P does not satisfy the Sperner property. • There does not exist a poset P' satisfying the first 4 conditions whose rank is smaller than the rank of P. For any added challenge, find (with proof) the minimal order (number of elements) of a poset satisfying these conditions.
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