Modifying surfaces in 4-manifolds by twist spinning

Details Modifying surfaces in 4-manifolds by twist spinning Modifying surfaces in 4-manifolds by twist spinning

2004-11-03

arxiv.org/abs/math/0411078v2

Geom. Topol. 10 (2006) 27-56

Mathematics

Geometric Topology

This is the version published by Geometry & Topology on 25 February 2006

Scientific paper

10.2140/gt.2006.10.27

In this paper, given a knot K, for any integer m we construct a new surface Sigma_K(m) from a smoothly embedded surface Sigma in a smooth 4-manifold X by performing a surgery on Sigma. This surgery is based on a modification of the `rim surgery' which was introduced by Fintushel and Stern, by doing additional twist spinning. We investigate the diffeomorphism type and the homeomorphism type of (X,Sigma) after the surgery. One of the main results is that for certain pairs (X,Sigma), the smooth type of Sigma_K(m) can be easily distinguished by the Alexander polynomial of the knot K and the homeomorphism type depends on the number of twist and the knot. In particular, we get new examples of knotted surfaces in CP^2, not isotopic to complex curves, but which are topologically unknotted.

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