Geodesic
Congruences on bands of π-groups
Discussiones Mathematicae. General Algebra and Applications, Tome 33 (2013) no. 1, pp. 5-11.

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A semigroup S is said to be completely π-regular if for any a ∈ S there exists a positive integer n such that aⁿ is completely regular. The present paper is devoted to the study of completely regular semigroup congruences on bands of π-groups.
Keywords: group congruence, completely regular semigroup congruence 
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Maity, Sunil. Congruences on bands of π-groups. Discussiones Mathematicae. General Algebra and Applications, Tome 33 (2013) no. 1, pp. 5-11. http://geodesic.mathdoc.fr/item/DMGAA_2013_33_1_a0/

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