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Showing 1 to 1 of 1 for “"refined Humbert invariant"”.
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Curves of genus 2 and quadratic forms
… to a curve C of genus 2. This form, known as the refined Humbert invariant, was introduced by Kani (1994). Our first main result is the classification of those imprimitive ternary quadratic forms which can occur as one of the forms qC, for some curve C of genus 2. We use this classification to …