Homological versus algebraic equivalence in a jacobian.

  title={Homological versus algebraic equivalence in a jacobian.},
  author={Brian Harris},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={80 4},
  • Brian Harris
  • Published 1983 in
    Proceedings of the National Academy of Sciences…
Let Z be an algebraic p cycle homologous to zero in an algebraic complex manifold V. Associated to Z is a linear function nu on holomorphic (2p + 1)-forms on V, modulo periods, that vanishes if Z is algebraically equivalent to zero in V. I give a formula for nu for the case of V the jacobian of an algebraic curve C and Z=C - C' (C' = "inverse" of C') in terms of iterated integrals of holomorphic 1-forms on C. If C is the degree 4 Fermat curve, I use this formula to show that C - C' is not… CONTINUE READING