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arXiv · 2001.10983

Hyperplane Sections of Hypersurfaces

Yiran Cheng
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Abstract

We compute some numerical invariants of the lines on hyperplane sections of a smooth cubic threefold over complex numbers. We also prove that for any smooth hypersurface $X\subset \mathbb P^{n+1}$ of degree $d$ over an algebraically closed field of characteristic zero, if $d>n>1$ and $(n,d)\neq (2,3),(3,4)$, then a general hyperplane section only admits finitely many others which are isomorphic to it.

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Yiran Cheng. 2020-01-29. Hyperplane Sections of Hypersurfaces. https://arxiv.org/abs/2001.10983

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