Geodesic
Qr-semigroups
Publications de l'Institut Mathématique, _N_S_29 (1981) no. 43, p. 15 
Stojan Bogdanović. Qr-semigroups. Publications de l'Institut Mathématique, _N_S_29 (1981) no. 43, p. 15 . http://geodesic.mathdoc.fr/item/PIM_1981_N_S_29_43_a1/
@article{PIM_1981_N_S_29_43_a1,
     author = {Stojan Bogdanovi\'c},
     title = {Qr-semigroups},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {15 },
     year = {1981},
     volume = {_N_S_29},
     number = {43},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1981_N_S_29_43_a1/}
}
TY  - JOUR
AU  - Stojan Bogdanović
TI  - Qr-semigroups
JO  - Publications de l'Institut Mathématique
PY  - 1981
SP  - 15 
VL  - _N_S_29
IS  - 43
UR  - http://geodesic.mathdoc.fr/item/PIM_1981_N_S_29_43_a1/
LA  - en
ID  - PIM_1981_N_S_29_43_a1
ER  - 
%0 Journal Article
%A Stojan Bogdanović
%T Qr-semigroups
%J Publications de l'Institut Mathématique
%D 1981
%P 15 
%V _N_S_29
%N 43
%U http://geodesic.mathdoc.fr/item/PIM_1981_N_S_29_43_a1/
%G en
%F PIM_1981_N_S_29_43_a1

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

Here, we give the definition of $Q_r$-semigroup i.e., a semigroup in which every proper right ideal is a power joined semigroup and we give as well some characterizations of weakly commutative $Q_r$-semigroups,