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math.AT2001
Invariants of Boundary Link Cobordism
Desmond Sheiham
An n-dimensional μ-component boundary link is a codimension 2 embedding of spheres L=\bigsqcup_μS^n \subset S^{n+2} such that there exist μdisjoint oriented embedded (n+1)-manifold…
math.RA2001
Non-commutative Characteristic Polynomials and Cohn Localization
Desmond Sheiham
Almkvist proved that for a commutative ring A the characteristic polynomial of an endomorphism α:P \to P of a finitely generated projective A-module determines (P,α) up to extensio…