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Embedded antichains in tournaments

✍ Scribed by Stephen J. Greenfield; Brenda J. Latka


Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
543 KB
Volume
11
Category
Article
ISSN
1571-0653

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✦ Synopsis


The maximum antichain cardinality (MACC) of a tournament is the maximum number of incomparable subtournaments of (T). We establish some properties of MACC. We describe all tournaments whose MACC is 1 or 2 , show that MACC can grow exponentially with the size of the vertex set of a tournament, and present some questions for further investigation.


πŸ“œ SIMILAR VOLUMES


Embedding tournaments in simple tourname
✍ J.W. Moon πŸ“‚ Article πŸ“… 1972 πŸ› Elsevier Science 🌐 English βš– 693 KB

A tournament is simple if the corresp(!nding reEationa1 system is simple in the alge brnlc ~nse. it ir sh~un that cony F~~utnmlent T,, with IT nodes can be embedded in in simple tourrramant r \*+ 1 apart from two exceptional types of tournaments which can be embeddecl rn a %impie Fournczmtn t TR+ 1.

Minimal Antichains in Well-founded Quasi
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We investigate the minimal antichains (in what is essentially Nash-Williams' sense) in a well-founded quasi-order. We prove the following finiteness theorem: If Q is a well-founded quasi-order and k a fixed natural number, then there is a finite set 4 k of minimal antichains of Q with the property t

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A subset A of an ordered set P is a cutset if each maximal chain of P meetsA ; if, in addition, A is an antichain call it an antichain cutset. Our principal result is a characterization, by means of a 'forbidden configuration', of those finite ordered sets, which can be expressed as the union of ant

Bypaths in tournaments
✍ Yubao Guo; Lutz Volkmann πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 559 KB

If every arc of a 3-connected tournament T is contained in a cycle of length 3, then every arc of T has a bypath of length k for each k > 3, unless T is isomorphic to two tournaments, each of which has exactly 8 vertices. This extends the corresponding result for regular tournaments, due to Alspach,