Finite fields | Theorems in algebraic number theory | Elliptic curves

Hasse's theorem on elliptic curves

Hasse's theorem on elliptic curves, also referred to as the Hasse bound, provides an estimate of the number of points on an elliptic curve over a finite field, bounding the value both above and below. If N is the number of points on the elliptic curve E over a finite field with q elements, then Hasse's result states that The reason is that N differs from q + 1, the number of points of the projective line over the same field, by an 'error term' that is the sum of two complex numbers, each of absolute value √q. This result had originally been conjectured by Emil Artin in his thesis. It was proven by Hasse in 1933, with the proof published in a series of papers in 1936. Hasse's theorem is equivalent to the determination of the absolute value of the roots of the local zeta-function of E. In this form it can be seen to be the analogue of the Riemann hypothesis for the function field associated with the elliptic curve. (Wikipedia).

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Related pages

Helmut Hasse | Kloosterman sum | Function field of an algebraic variety | Geometric genus | Emil Artin | Projective line | Absolute value | Complex number | Elliptic curve | Sato–Tate conjecture | Finite field | Riemann hypothesis | André Weil | Weil conjectures | Schoof's algorithm