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The Almost Split Sequences for Trivial Extensions of Hereditary Algebras
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作者 Zhang Yu-lin yao hai-lou 《Communications in Mathematical Research》 CSCD 2014年第4期369-378,共10页
Let A be a basic hereditary artin algebra and R = A Q be the trivial extension of A by its minimal injective cogenerator Q. We construct some right (left) almost split morphisms and irreducible morphisms in modR thr... Let A be a basic hereditary artin algebra and R = A Q be the trivial extension of A by its minimal injective cogenerator Q. We construct some right (left) almost split morphisms and irreducible morphisms in modR through the corresponding morphisms in modA. Furthermore, we can determine its almost split sequences in modR. 展开更多
关键词 hereditary algebra trivial extension AR sequence irreducible morphism
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