A Remark on Kleiman–Piene's Question for Gauss Maps
A Remark on Kleiman–Piene's Question for Gauss Maps
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DOI:
10.1080/00927870601142066
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发表时间:
2007
影响因子:
0.7
通讯作者:
Satoru Fukasawa
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作者:
Satoru Fukasawa
We find a nonreflexive projective 3-fold in P 5 with birational Gauss map onto its image, in any positive characteristic. This gives a negative answer, also in characteristic p > 2, of the following Kleiman–Piene's question: Does the separability of the Gauss map imply reflexivity? Kaji already gave a negative answer in characteristic 2.
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