On Nash\'s 4-sphere and Property 2R

D. Nash defined a family of homotopy 4-spheres in [11]. Proving that his manifolds Sm,n,m',n' are all real S4, we show that they have handle decomposition with no 1-handles, two 2-handles and two 3-handles. The handle structures give new potential counterexamples to the Property 2R conjecture.

On Nash\'s 4-sphere and Property 2R

D. Nash defined a family of homotopy 4-spheres in [11]. Proving that his manifolds Sm,n,m',n' are all real S4, we show that they have handle decomposition with no 1-handles, two 2-handles and two 3-handles. The handle structures give new potential counterexamples to the Property 2R conjecture.

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  • Akbulut, S.: Cappell-Shaneson homotopy spheres are standard. Ann. of Math. 149, 497–510. (1999).
  • Akbulut, S.: Nash homotopy spheres are standard. Preceedings of the 17th G¨ okova Geometry-Topology Conference 135-1 Akbulut, S., Kirby, R.: Apotential smooth counterexample in dimension 4 to the Poincar´e conjecture, the Schoenflies conjecture, and the Andrews-Curtis conjecture. Topology 24.4, 375–390 (1985).
  • Cappell, S.E., Shaneson, J.L.: There exist inequivalent knots with the same complement. Ann. of Math. (2) 103, 4, 349–353 (1976).
  • Fintushel, R., Stern, R.: Pinwheels and nullhomologous surgery on 4-manifolds with b + = 1 . Algebraic & Geometric Topology 11 (2011) no. 1, 1649–1699.
  • Freedman, M., Gompf, G., Morrison, S., Walker, K.: Man and machine thinking about the smooth 4-dimensional Poincare conjecture. Quantum Topol. 1, 2, 171–208 (2010).
  • Gabai, D.: Foliations and the topology of 3-manifolds. III. J. Differential Geom. 26, 479–536 (1987).
  • Gompf, R.: On Cappell-Shaneson 4-spheres. Topology Appl. 38, 2, 123–136 (1991).
  • Gompf, R.: Killing the Akbulut-Kirby 4-sphere, with relevance to the Andrews-Curtis and Schoenflies problems. Topology 30, no. 1, 97–115 (1991).
  • Gompf, R.: More Cappell-Shaneson spheres are standard. Algebr. Geom. Topol. 10, no. 3, 1665–1681, (2010). Nash, D.: New Homotopy 4-Spheres. Pacific Journal of Math. (256) 2012 no. 1, 165–176.
  • Sharlemann,M., Thompson,A.: Fibered knots and Property 2R. arXiv:maht/0901.2319v1.