ArticleAuthors: Ngo, Si Tung (2004)
It is shown that a semiperfect ring R is quasi-Frobenius if and only if R has finite right uniform dimension and every closed uniform submodule of R(u) is a direct summand where R(u>) denotes the direct sum of UJ copies of the right R -module R and u is the first infinite ordinal. This result extends the one of D. V. Huynh and N. s. Tung in [5. Theorem 1].