Optimalité, congruences et calculs d'invariants des variétés symplectiques réelles de dimension quatre

Jean-Yves Welschinger

This paper follows a previous one in which were introduced deformation invariants ${\chi }_r^d$, $d\in H_2(X;\mathbb{Z})$, $r\in \mathbb{N}$, of closed real symplectic four-manifolds $(X,\omega ,c_X)$,…