C: R−→ HomR (C, C) is an isomorphism and Ext> 0 R (C, C)= 0. Trivial examples of
semidualizing R-modules include R itself and a dualizing R-module when one exists. The …

Remark When (S, n) is a Cohen-Macaulay local ring with dimension d and
[Cn]⊲···⊲[C1]⊲[C0] is a suitable chain in G0 (S) of length n, then [Cn]⊲···⊲[C1]⊲[C0] is also a …