On factorial double solids with simple double points |
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Authors: | Kyusik Hong |
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Affiliation: | Department of Mathematics, POSTECH, Pohang, Kyungbuk, 790-784, Republic of Korea |
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Abstract: | We study when double covers of P3 ramified along nodal surfaces are not Q-factorial. In particular, we describe all the Q-factorial double covers of P3 ramified along quartic surfaces with at most seven simple double points and sextic surfaces with at most 16 simple double points. |
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Keywords: | 14C20 14J17 14J30 |
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