We give a recursive formula for purely real Welschinger invariants of the following real Del Pezzo surfaces: the projective plane blown up at q real and s 1 pairs of conjugate imaginary points, where q C 2s 5, and the real quadric blown up at s 1 pairs of conjugate imaginary points and having non-empty real part. The formula is similar to Vakil's recursive formula  for Gromov-Witten invariants of these surfaces and generalizes our recursive formula  for purely realWelschinger invariants of real toric Del Pezzo surfaces. As a consequence, we prove the positivity of the Welschinger invariants under consideration and their logarithmic asymptotic equivalence to genus zero Gromov-Witten invariants.
All Science Journal Classification (ASJC) codes
- !!Applied Mathematics
- !!General Mathematics