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arXiv 2019-12-23 3 views

Surfaces generating the even primal cohomology of an abelian fivefold

Conder, Jonathan · Dewey, Edward · Izadi, Elham

Original · EN

Given a very general abelian fivefold A and a principal polarization Θ⊂ A, we construct surfaces generating the algebraic part of the middle cohomology H⁴(Θ, Q), and determine the intersection pairing between these surfaces. In particular, we obtain a new proof of the Hodge conjecture for H⁴(Θ, Q) and show that it contains a copy of the root lattice of E₆.

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