Brouwer, A. E.; Schrijver, A. On the period of an operator, defined on antichains. (English) Zbl 0282.06003 Math. Centrum, Amsterdam, Afd. zuivere Wisk. ZW 24/74, 13 p. (1974). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 17 Documents MSC: 06A06 Partial orders, general 05A05 Permutations, words, matrices 06E05 Structure theory of Boolean algebras PDF BibTeX XML