2-torsion and 4-torsion conjecture for double coverings of arrangement complements
Let A\mathcal{A}A be a complex hyperplane arrangement, let M(A)M(\mathcal{A})M(A) be its complement, and let ω∈H1(M(A),Z2)\omega\in H^1(M(\mathcal{A}),\mathbb{Z}_2)ω∈H1(M(A),Z2). Denote by…