Exotic Smooth Structures on Small 4-Manifolds with Odd Signatures

Details Exotic Smooth Structures on Small 4-Manifolds with Odd Signatures Exotic Smooth Structures on Small 4-Manifolds with Odd Signatures

2007-01-29

arxiv.org/abs/math/0701829v5

Mathematics

Geometric Topology

21 pages

Scientific paper

Let $M$ be $\CP#2\CPb$, $3\CP#4\CPb$ or $(2n-1)\CP#2n\CPb$ for any integer $n\geq 3$. We construct an irreducible symplectic 4-manifold homeomorphic to $M$ and also an infinite family of pairwise non-diffeomorphic irreducible non-symplectic 4-manifolds homeomorphic to $M$. We also construct such exotic smooth structures when $M$ is $\CP#4\CPb$ or $3\CP# k \CPb$ for $k=6,8,10$.

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