Blanchfield and Seifert algebra in high dimensional boundary link theory I. Algebraic K-theory, by Andrew Ranicki and Desmond Sheiham

The classification of high-dimensional mu-component boundary links motivates decomposition theorems for the algebraic K-groups of the group ring A[F_mu] and the noncommutative Cohn localization Sigma^{-1}A[F_mu], for any mu >0 and an arbitrary ring A, with F_mu the free group on mu generators and Sigma the set of matrices over A[F_mu] which become invertible over A.

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