Degree-2 Abel maps for nodal curves

@article{Coelho2012Degree2AM,
  title={Degree-2 Abel maps for nodal curves},
  author={Juliana Coelho and Eduardo Esteves and Marco Pacini},
  journal={arXiv: Algebraic Geometry},
  year={2012}
}
We present numerical conditions for the existence of natural degree-2 Abel maps for any given nodal curve. Cocoa scripst were written and have so far verified the validity of the conditions for numerous curves. 

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