## Seifert fibred knot manifolds

### J.A.Hillman

#### Abstract

We consider the question of when is the closed manifold obtained by elementary surgery on an $$n$$-knot Seifert fibred over a 2-orbifold. After some observations on the classical case, we concentrate on the cases $$n=2$$ and 3. We have found a new family of 2-knots with torsion-free, solvable group, overlooked in earlier work. We show also that there are no aspherical Seifert fibred 3-knot manifolds. We know of no higher dimensional examples.

Keywords: knot, Seifert fibred, $$0$$-framed surgery.

: Primary 57M25; secondary 57Q45.

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 Tuesday, January 8, 2013