Welschinger invariants of blow-ups of symplectic 4-manifolds
Welschinger invariants of blow-ups of symplectic 4-manifolds
Using the degeneration technique, we study the behavior of Welschinger invariants under the blow-up and obtain some blow-up formulae of Welschinger invariants. To analyze the variation of Welschinger invariants when replacing a pair of real points in the real configuration by a pair of conjugated points, Welschinger introduced the $\theta …