Collaborative analysis of GSJ geochemical reference materials JCu-1 (Copper ore) and JZn-1 (Zinc ore).
نویسندگان
چکیده
منابع مشابه
PI ORE EXTENSIONS 3 1 Preliminaries
Necessary and sufficient conditions for an Ore extension S = R[x;σ, δ] to be a PI ring are given in the case σ is an injective endomorphism of a semiprime ring R satisfying the ACC on annihilators. Also, for an arbitrary endomorphism τ of R, a characterization of Ore extensions R[x; τ ] which are PI rings is given, provided the coefficient ring R is noetherian.
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 2002
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.51.973