Conformally flat pseudo-symmetric spaces of constant type Giovanni Calvaruso (2006) Czechoslovak Mathematical Journal Similarity: We give the complete classification of conformally flat pseudo-symmetric spaces of constant type.
Einstein-like semi-symmetric spaces Eric Boeckx (1993) Archivum Mathematicum Similarity: One proves that semi-symmetric spaces with a Codazzi or Killing Ricci tensor are locally symmetric. Some applications of this result are given.