Regular, inverse, and completely regular centralizers of permutations
نویسندگان
چکیده
منابع مشابه
Regular centralizers of idempotent transformations
Denote by T (X) the semigroup of full transformations on a set X. For ε ∈ T (X), the centralizer of ε is a subsemigroup of T (X) defined by C(ε) = {α ∈ T (X) : αε = εα}. It is well known that C(idX) = T (X) is a regular semigroup. By a theorem proved by J.M. Howie in 1966, we know that if X is finite, then the subsemigroup generated by the idempotents of C(idX) contains all non-invertible trans...
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ژورنال
عنوان ژورنال: Mathematica Bohemica
سال: 2003
ISSN: 0862-7959,2464-7136
DOI: 10.21136/mb.2003.134038