Countable imaginary simple unidimensional theories

@inproceedings{Shami2009CountableIS,
  title={Countable imaginary simple unidimensional theories},
  author={Ziv Shami},
  year={2009}
}
We prove that a countable simple unidimensional theory that eliminates hyperimaginaries is supersimple. This solves a problem of Shelah in the more general context of simple theories under weak assumptions.