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arxiv: 1707.07249 · v1 · pith:IWJLO5DO · submitted 2017-07-23 · math.NT · cs.NA· math-ph· math.MP· math.NA

Computing period matrices and the Abel-Jacobi map of superelliptic curves

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classification math.NT cs.NAmath-phmath.MPmath.NA
keywords curvesabel-jacobialgorithmmatricesmethodperiodsuperellipticaccuracy
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We present an algorithm for the computation of period matrices and the Abel-Jacobi map of complex superelliptic curves given by an equation $y^m=f(x)$. It relies on rigorous numerical integration of differentials between Weierstrass points, which is done using Gauss method if the curve is hyperelliptic ($m=2$) or the Double-Exponential method. We take linear combination of these integrals to obtain the actual periods on a symplectic basis of loops. The algorithm is implemented and makes it possible to reach thousands of digits accuracy even on large genus curves.

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