Geodesic
Functional equations in the theory of semigroups
Matematičeskie zametki, Tome 7 (1970) no. 5, pp. 635-640.

Voir la notice de l'article provenant de la source Math-Net.Ru

It is established that the collection of regular solutions of the equation $f(t+s)=G[f(t),f(s)]$, where $G(\alpha, \beta)$ is a symmetric polynomial, coincides with the collection of semigroups. 
@article{MZM_1970_7_5_a11,
     author = {V. P. Anosov and P. E. Sobolevskii},
     title = {Functional equations in the theory of semigroups},
     journal = {Matemati\v{c}eskie zametki},
     pages = {635--640},
     publisher = {mathdoc},
     volume = {7},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a11/}
}
TY  - JOUR
AU  - V. P. Anosov
AU  - P. E. Sobolevskii
TI  - Functional equations in the theory of semigroups
JO  - Matematičeskie zametki
PY  - 1970
SP  - 635
EP  - 640
VL  - 7
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a11/
LA  - ru
ID  - MZM_1970_7_5_a11
ER  - 
%0 Journal Article
%A V. P. Anosov
%A P. E. Sobolevskii
%T Functional equations in the theory of semigroups
%J Matematičeskie zametki
%D 1970
%P 635-640
%V 7
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a11/
%G ru
%F MZM_1970_7_5_a11
V. P. Anosov; P. E. Sobolevskii. Functional equations in the theory of semigroups. Matematičeskie zametki, Tome 7 (1970) no. 5, pp. 635-640. http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a11/