A Combinatorial Characterazition of the Fermat Cubic Surface in Characteristic 2

A Combinatorial Characterazition of the Fermat Cubic Surface in Characteristic 2
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特征2中费马立方曲面的组合特征

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发表时间:
1997
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通讯作者:
M. Homma
M. Homma
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作者:
M. Homma

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我们研究特征2中的特定几何。设X是一个三次曲面,由中心点P1,…,P6。我们证明了X与方程为∑xi3的Fermat三次曲面射影等价当且仅当P1,…,P6是通过其余五个点的二次曲线的核。
We study a particular geometry in characteristic 2. Let X be a cubic surface obtained from ℙ2 by means of blowing up with centersP1,...,P6. We prove that X is projectively equivalent to the Fermat cubic surface with equation ∑xi3 if and only if each point of P1,..., P6 is the nucleus of the conic passing through the remaining five points.