, Volume 173, Issue 1, pp 209-223

Exotic smooth structures on small 4-manifolds

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Let M be either \(\mathbb{CP}^{2}\#3\overline{\mathbb{CP}}^{2}\) or \(3\mathbb{CP}^{2}\#5\overline{\mathbb{CP}}^{2}\) . We construct the first example of a simply-connected irreducible symplectic 4-manifold that is homeomorphic but not diffeomorphic to M.

Dedicated to Ronald J. Stern on the occasion of his sixtieth birthday

Mathematics Subject Classification (2000)

Primary 57R55; Secondary 57R17, 57M05