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We study embeddings in a certain fixed, nontrivial homotopy class of one copy of the circle S 1 in any closed, aspherical, orientable, irreducible 3-dimensional Seifert fibered 3-manifold, M, and extract a collection of numerical concordance invariants from certain quotients of the fundamental group of the complement of the knot. (The property of the fundamental group of the target 3-manifold...
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