Abstract (EN):
We show that if S is a finite semigroup with aperiodic idempotent-generated subsemi-group and H is a pseudovariety of groups, then the sequence of iterated H-kernels of S stops at the idempotent-generated subsemigroup if and only if each subgroup of S belongs to the wreath product closure of H. Applications are given to Mal'cev products.
Language:
English
Type (Professor's evaluation):
Scientific
Contact:
mdelgado@fc.up.pt; vhf@fct.unl.pt; stwm@math.huji.ac.il; bsteinbg@math.carleton.ca
No. of pages:
11