Exotic symplectic structures on $S^3 \times \Bbb{R}$
Bull. Korean Math. Soc. 1998 Vol. 35, No. 1, 1-12
Yong Seoung Cho and Jin Yue Yoon Ewha Womans University, Ewha Womans University
Abstract : We construct exotic symplectic structures on $S^{3}\times \Bbb R $ which is obtained by the symplectic sum of two smooth symplectic four-manifolds with exotic symplectic structures, each of which is diffeomorphic to $\Bbb R^4 $.
