%0 Journal Article %A Ashrafi, N. %A Pouyan, N. %T On Twin--Good Rings %J Iranian Journal of Mathematical Sciences and Informatics %V 12 %N 1 %U http://ijmsi.ir/article-1-638-en.html %R DOI: 10.7508/ijmsi.2017.01.010 %D 2017 %K Twin-good ring, Neat ring, Regular Baer ring, π-Regular., %X 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. %> http://ijmsi.ir/article-1-638-en.pdf %P 119-129 %& 119 %! %9 Research paper %L A-10-239-2 %+ Semnan University %G eng %@ 1735-4463 %[ 2017