Characterization of matrix types of ultramatricial algebras

نویسنده

  • Gábor Braun
چکیده

For any equivalence relation ≡ on positive integers such that nk ≡ mk if and only if n ≡ m, there is an abelian group G such that the endomorphism ring of Gn and Gm are isomorphic if and only if n ≡ m. However, Gn and Gm are not isomorphic if n = m.

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تاریخ انتشار 2004