Hadamard products and BPS networks
Abstract We study examples of fourth-order Picard-Fuchs operators that are Hadamard products of two second-order Picard-Fuchs operators.Each second-order Picard-Fuchs operator is associated with a family of elliptic curves, and Hip Bag the Hadamard product computes period integrals on the fibred product of the two elliptic surfaces.We construct 3-c