Immersed projective planes, Arf invariants and even 4-manifolds
classification
🧮 math.GT
keywords
evenmanifoldsconstructdefinitiondiscoveredexploitformimmersed
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In this paper, we exploit a subtle indeterminacy in the definition of the spherical Kervaire-Milnor invariant which was discovered by R. Stong to construct non-spin 4-manifolds with even intersection form and prescribed signature.
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