Blow-up formulas for (-2)-spheres

Rogier Brussee

Let $X$ be a simply connected 4-manifold containing a $(-1)$-sphere $e$. Fintushel and Stern prove that $$D_c(\exp (te))=D_c(B(t))on{e}^{\perp }ifc\cdot eiseven,$$ $$ D_c(\exp(…