Intersection Form (4-manifold)
In mathematics, the intersection form of an oriented compact 4-manifold is a special symmetric bilinear form on the 2nd cohomology group of the 4-manifold. It reflects much of the topology of the 4-manifolds, including information on the existence of a smooth structure.
Read more about Intersection Form (4-manifold): Definition, Poincaré Duality, Properties and Applications, Non-orientable Manifolds
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