Plane quartic twists of X(5,3)
Julio Fernandez, Josep Gonzalez, Joan-C. Lario
Abstract
Given an odd representation of the absolute Galois group of Q onto PGL(2,3) and a positive integer N, there exists a twisted modular curve defined over Q whose rational points classify the quadratic Q-curves of degree N realizing the representation. The paper gives a method to provide an explicit plane quartic model for this curve in the genus-three case N=5.
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