Let $A$ be an abelian surface and $\text{Km}(A)$ be the Kummer surface of $A$. If I remember correctly, the Picard number $\rho(\text{Km}(A))$ is equal to $16+\rho(A)$.
Does anyone know any reference or proof for this fact?
The Picard number of the Kummer surface of an abelian surface
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