Jacobians in Isogeny Classes of Abelian Surfaces over Finite Fields

  title={Jacobians in Isogeny Classes of Abelian Surfaces over Finite Fields},
  author={Everett W. Howe and Enric Nart and Christophe Ritzenthaler},
We give a complete answer to the question of which polynomials occur as the characteristic polynomials of Frobenius for genus-2 curves over finite fields. 

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