Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, II
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- Hirokado, M., Ito, H. & Saito, N. manuscripta math. (2008) 125: 325. doi:10.1007/s00229-007-0151-x
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We construct examples of supersingular Calabi-Yau threefolds in characteristic 2 making use of the method by Schoen. Unirational Calabi-Yau threefolds of five different topological types are obtained. There are two examples with the third Betti number zero among them, and they are counted as other examples of non-liftable Calabi-Yau threefolds in characteristic 2 after the one given by Schröer.