We construct explicit examples of K3 surfaces over Q which are of degree 2 and geometric Picard rank 1. We construct, particularly, examples of the form w~2 = det M where M is a (3 × 3)-matrix of ternary quadratic forms.
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机译：我们构造了Q上K3曲面的显式实例，其阶数为2，几何Picard秩为1。我们特别构造了w〜2 = det M形式的示例，其中M是三元二次形式的（3×3）矩阵。
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