Abstract:A ring R is said to be of stable range 1.5 if for each a, b ∈ R and 0 = c ∈ R satisfying aR+ bR+ cR = R there exists r ∈ R such that (a+ br)R+ cR = R. Let R be a commutative domain in which all finitely generated ideals are principal, and let R be of stable range 1.5. Then each matrix A over R is reduced to Smith's canonical form by transformations P AQ in which P and Q are invertible and at least one of them can be chosen to be a product of elementary matrices. We generalize Helmer's theorem about the greates… Show more
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