Character sums determined by low degree isogenies of elliptic curves
classification
🧮 math.NT
keywords
isogeniescharactersumscurvesdegreedeterminedellipticarbitrary
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We consider character sums determined by isogenies of elliptic curves over finite fields. We prove a congruence condition for character sums attached to arbitrary cyclic isogenies, and produce explicit formulas for isogenies of small degree.
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