Extensions relative to a Serre class
نویسندگان
چکیده
منابع مشابه
Extensions Relative to a Serre Class
Consider a class C of projective /^-modules, where R is a commutative ring with identity, which satisfies the conditions of (2), namely that C is closed under the operations of direct sum and isomorphism and C contains the zero module. Following (2) a module M is said to have C-cotype n (respectively C-type n) if it has a projective resolution ...-*.?„->•...->.Po->M->0 with /",-eC for i>n (resp...
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ژورنال
عنوان ژورنال: Proceedings of the Edinburgh Mathematical Society
سال: 1975
ISSN: 0013-0915,1464-3839
DOI: 10.1017/s0013091500010488