Cycles algébriques sur les surfaces K3 réelles

Frédéric Mangolte

For a real algebraic K3 surface $X(R)$, we give all possible values of the dimension $h_{alg}^1(X(R)$ of the group $\H^1_{alg}(X(R),Z/2)$ of algebraic cycles of $X(R)$. In particul…