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A note on blockers ...
A note on blockers in posets
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- Björner, Anders (författare)
- KTH,Matematik
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- Hultman, Axel (författare)
- KTH,Matematik
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(creator_code:org_t)
- Springer Science and Business Media LLC, 2004
- 2004
- Engelska.
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Ingår i: Annals of Combinatorics. - : Springer Science and Business Media LLC. - 0218-0006 .- 0219-3094. ; 8:2, s. 123-131
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The blocker A* of an antichain A in a finite poset P is the set of elements minimal with the property of having with each member of A a common predecessor. The following is done: (1) The posets P for which A** = A for all antichains are characterized.(2) The blocker A* of a symmetric antichain in the partition lattice is characterized.(3) Connections with the question of finding minimal size blocking sets for certain set families are discussed.
Ämnesord
- NATURVETENSKAP -- Matematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics (hsv//eng)
Nyckelord
- antichain
- blocker
- partition
- dominance
- refinement
- blocking set
- Tur an
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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