Geodesic
Su alcune proprietà del semigruppi finiti
Séminaire lotharingien de combinatoire, Tome 16 (1987) 
Giuseppe Pirillo. Su alcune proprietà del semigruppi finiti. Séminaire lotharingien de combinatoire, Tome 16 (1987). http://geodesic.mathdoc.fr/item/SLC_1987_16_a8/
@article{SLC_1987_16_a8,
     author = {Giuseppe Pirillo},
     title = {Su alcune propriet\`a del semigruppi finiti},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1987},
     volume = {16},
     url = {http://geodesic.mathdoc.fr/item/SLC_1987_16_a8/}
}
TY  - JOUR
AU  - Giuseppe Pirillo
TI  - Su alcune proprietà del semigruppi finiti
JO  - Séminaire lotharingien de combinatoire
PY  - 1987
VL  - 16
UR  - http://geodesic.mathdoc.fr/item/SLC_1987_16_a8/
ID  - SLC_1987_16_a8
ER  - 
%0 Journal Article
%A Giuseppe Pirillo
%T Su alcune proprietà del semigruppi finiti
%J Séminaire lotharingien de combinatoire
%D 1987
%V 16
%U http://geodesic.mathdoc.fr/item/SLC_1987_16_a8/
%F SLC_1987_16_a8

Voir la notice de l'acte provenant de la source Séminaire Lotharingien de Combinatoire website

Given a finite semigroup S, the smallest integer n for which S has the property P can be considered as a "measure" of how much S deviates from being abelian. This integer in the case of finite groups of order not higher than 32 has been found, also using the computer, and is at most 6, a value which is reached only in the case of the symmetric group on 4 objects.