AU - Ashrafi, N. AU - Pouyan, N. TI - On Twin--Good Rings PT - JOURNAL ARTICLE TA - IJMSI JN - IJMSI VO - 12 VI - 1 IP - 1 4099 - http://ijmsi.ir/article-1-638-en.html 4100 - http://ijmsi.ir/article-1-638-en.pdf SO - IJMSI 1 ABĀ  - In this paper, we investigate various kinds of extensions of twin-good rings. Moreover, we prove that every element of an abelian neat ring R is twin-good if and only if R has no factor ring isomorphic to‌ $Z_2$ or $Z_3$. The main result of [24] states some conditions that any right self-injective ring R is twin-good. We extend this result to any regular Baer ring R by proving that every element of a regular Baer ring is twin-good if and only if R has no factor ring isomorphic to $Z_2$ or $Z_3$. Also we illustrate conditions under which extending modules, continuous modules and some classes of vector space are twin-good. CP - IRAN IN - Department of mathematics, Semnan University, Semnan, Iran LG - eng PB - IJMSI PG - 119 PT - Research paper YR - 2017