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Andrey O. Matveev, "A note on operators of deletion and contraction for antichains", International Journal of Mathematics and Mathematical Sciences, vol. 31, Article ID 603792, 5 pages, 2002. https://doi.org/10.1155/S0161171202108088
A note on operators of deletion and contraction for antichains
Abstract
The operators of deletion and contraction for clutters are generalized to those for antichains of finite bounded posets. A generalization of the result by Seymour (1976), describing the relationship between the operators of deletion, contraction, and the blocker map, is considered as a comparison in the lattice of antichains of a poset.
Copyright
Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
