【摘要】 引入弱Π-凝聚环的概念,即自由模的f.g.子模为f.p.模的环类,它是介于Π-凝聚环和凝聚环间的一类环。在此基础上给出了相关定理及证明。更多还原

【Abstract】 After introduction of the concept of weak Π-coherent rings,i.e.,the class of rings in which the finitely generated submodules of free modules are finitely presented,Relative theories were proved.更多还原