Abstract (EN):
<jats:p>In this note we show that a ring $R$ is left perfect if and only if every left $R$-module is weakly supplemented if and only if $R$ is semilocal and the radical of the countably infinite free left $R$-module has a weak supplement.</jats:p>
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica