
The author establishes a multiplicative analog (for character sums) of Hua's theorem on the estimate of complete trigonometric sums in an algebraic number field. On the other hand, a relationship between liftings of a character sum in a local field is also studied.
Hua's theorem, multiplicative analog, estimates on character sums, Estimates on character sums, Algebraic number theory: local fields
Hua's theorem, multiplicative analog, estimates on character sums, Estimates on character sums, Algebraic number theory: local fields
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