Welschinger invariants revisited
  We establish the enumerativity of (original and modified) Welschinger invariants for every real divisor on any real algebraic Del Pezzo surface and give an algebro-geometric proof of the invariance of that count both up to variation of the point constraints on a given surface and variation of the complex structure of the surface itself. 
Ilia Itenberg, Viatcheslav Kharlamov, and Eugenii Shustin
math.AG