Idempotents, regular elements and sequen
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T.E. Hall; M.V. Sapir
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Article
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1996
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Elsevier Science
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English
β 483 KB
If n is the number of nonidempotent elements of a finite semigroup S, it is shown that each sequence of length 2 n of elements of S contains a consecutive subsequence whose product is an idempotent element, and that 2 n is the best possible among all finite semigroups with n nonidempotent elements.