Cubic surfaces of characteristic two
Cubic surfaces of characteristic two
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特征二的立方表面
DOI:
10.1090/tran/8341
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发表时间:
2021
影响因子:
1.3
通讯作者:
Witt, Emily E.
中科院分区:
文献类型:
--
作者:
Kadyrsizova, Zhibek;Kenkel, Jennifer;Page, Janet;Singh, Jyoti;Smith, Karen E.;Vraciu, Adela;Witt, Emily E.
Cubic surfaces in characteristic two are investigated from the point of view of prime characteristic commutative algebra. In particular, we prove that the non-Frobenius split cubic surfaces form a linear subspace of codimension four in the 19-dimensional space of all cubics, and that up to projective equivalence, there are finitely many non-Frobenius split cubic surfaces. We explicitly describe defining equations for each and characterize them as extremal in terms of configurations of lines on them. In particular, a (possibly singular) cubic surface in characteristic two fails to be Frobenius split if and only if no three lines on it form a “triangle”. References
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DOI:
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发表时间:
1983
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作者:
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通讯作者:
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影响因子:
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1974
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