PF -rings and the Grethendieck groups of groups rings
Received:August 02, 1988  
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Tong Wenting Nanjing University 
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      Let R be a commutative ring with 1, G an Abelian group, RG the group ring on R and G. In this paper we gave some properties of PF- rings in which f. g. projective modules are free. The Grothendieck groups K0(RG) for some cases are given. In addition, for the ring R with the unimodular column property, we proved the following result: K0(RG) ≈K0(R), hence if R ∈PF, then K0(RG)≈Z .
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