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Primes Dividing Invariants of CM Picard Curves
Published online by Cambridge University Press: 07 May 2019
Abstract
We give a bound on the primes dividing the denominators of invariants of Picard curves of genus 3 with complex multiplication. Unlike earlier bounds in genus 2 and 3, our bound is based, not on bad reduction of curves, but on a very explicit type of good reduction. This approach simultaneously yields a simplification of the proof and much sharper bounds. In fact, unlike all previous bounds for genus 3, our bound is sharp enough for use in explicit constructions of Picard curves.
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- © Canadian Mathematical Society 2018
Footnotes
Author E. L. G. was partially supported by a project PEPS-Jeunes Chercheur-e-s - 2017. Author P. K. was partially supported by DFG priority project SPP 1489.
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