科研之友
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摘要
Let be the semigroup of all full transformations on the finite set X (n) ={1,2,aEuro broken vertical bar,n}. For 1a parts per thousand currency signra parts per thousand currency signn, set . In this note we show that, for 2a parts per thousand currency signra parts per thousand currency signn-2, any maximal regular subsemigroup of the semigroup is idempotent generated, but this may not happen in the semigroup .
