A plug with infinite order and some exotic 4-manifolds
arXiv:1201.6000
Abstract
Every exotic pair in 4-dimension is obtained each other by twisting a {\it cork} or {\it plug} which are codimension 0 submanifolds embedded in the 4-manifolds. The twist was an involution on the boundary of the submanifold. We define cork (or plug) with order and show there exists a plug with infinite order. Furthermore we show twisting gives to enlargements of compact exotic manifolds with boundary.
13 pages, 17 figures