Galois-cover fundamental group conjecture

From papers

Let XX be a simply connected complex surface, let fk:XCP2f_k:X\to\mathbb{CP}^2 be a generic projection defined by sections of LkL^{\otimes k}, let X~k\tilde{X}_k be the associated Galois cover, let LkL_k denote the corresponding class, and let nk=degfkn_k=\deg f_k. Galois-cover fundamental group conjecture. For sufficiently large kk,

π1(X~k)(Zks)nk2,\pi_1(\tilde{X}_k)\simeq (\mathbb{Z}_{ks})^{n_k-2},

where ksks is the divisibility of LkL_k in H2(X,Z)H_2(X,\mathbb{Z}). This predicts an explicit fundamental group for Galois covers associated with generic projections; it is stated as holding in the examples treated in the paper, but the general assertion remains open.

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Sources & referencesView supporting material

Primary source

D. Auroux, S. K. Donaldson, L. Katzarkov and M. Yotov, “Fundamental groups of complements of plane curves and symplectic invariants”, arXiv:math/0203183 (2002).

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