Abstract
We define a diffeomorphism invariant of smooth 4–manifolds which we can estimate for many smoothings of and other smooth 4–manifolds. Using this invariant we can show that uncountably many smoothings of support no Stein structure. Gompf constructed uncountably many smoothings of which do support Stein structures. Other applications of this invariant are given.
Citation
Laurence R Taylor. "An invariant of smooth 4–manifolds." Geom. Topol. 1 (1) 71 - 89, 1997. https://doi.org/10.2140/gt.1997.1.71
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