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A generalization of several classical invariants of links. (English) Zbl 1148.57005
A quasi-cylinder over a commutative ring $$R$$ is an oriented 3-manifold $$M$$ endowed with a submodule $$V$$ of the $$R$$-module $$H_1(\partial M;R)$$ such that the inclusion homomorphism $$V\to H_1(M;R)$$ is an isomorphism. The authors extend some classical invariants of links in the 3-sphere to links in so-called quasi-cylinders.

MSC:
 57M25 Knots and links in the $$3$$-sphere (MSC2010) 57M27 Invariants of knots and $$3$$-manifolds (MSC2010)
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References:
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