دوره 13، شماره 2 - ( 7-1397 )
جلد 13 شماره 2 صفحات 171-163 |
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چکیده:
We define the notion of almost $n$-layered $QTAG$-modules and study their basic properties. One of the main result is that almost 1-layered modules are almost $(omega+1)$-projective exactly when they are almost direct sum of countably generated modules of length less than or equal to $(omega+1)$. Some other characterizations of this new class are also established.
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