Geodesic
A class of inert semigroup rings
Matematičeskie zametki, Tome 22 (1977) no. 3, pp. 453-463 
B. V. Tarasov. A class of inert semigroup rings. Matematičeskie zametki, Tome 22 (1977) no. 3, pp. 453-463. http://geodesic.mathdoc.fr/item/MZM_1977_22_3_a14/
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     author = {B. V. Tarasov},
     title = {A~class of inert semigroup rings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {453--463},
     year = {1977},
     volume = {22},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_3_a14/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

A theorem of inertness for a class of semigroup rings is proved. An example showing that this class of rings is not totally inert is constructed.