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arXiv math/0310322math.CO
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点超平面图的覆盖

Covers of Point-Hyperplane Graphs

Arjeh M. Cohen, E. J. Postma

摘要:

对特征为2的域构造了投射维数为3的非入射点超平面图的覆盖。如果域的基数大于2,我们得到了SL_4(F)的F^6非分裂扩张的初等构造。

英文摘要:

We construct a cover of the non-incident point-hyperplane graph of projective dimension 3 for fields of characteristic 2. If the cardinality of the field is larger than 2, we obtain an elementary construction of the non-split extension of SL_4 (F) by F^6.

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