
doi: 10.1007/bf00354897
For the definitions of cutset, disjoint family and Menger family as well as a statement of Menger's theorem see the review above (Zbl 0678.06001). In this paper it is shown that if an ordered set P contains at most k pairwise disjoint maximal chains, where k is finite, then every finite family of maximal chains in P has a cutset of size at most k. This leads to the following Menger-type result that, if in addition P contains k pairwise disjoint complete maximal chains, then the whole family, M(P), of maximal chains in P has a cutset of size k. A direct proof of this result is also given. The authors then disprove a conjecture by Zaguia by providing an example that shows that the finiteness of k is essential.
maximal chains, Partial orders, general, Menger's theorem, cutset, Menger family, disjoint family
maximal chains, Partial orders, general, Menger's theorem, cutset, Menger family, disjoint family
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