English

On codimension two subvarieties in hypersurfaces

Algebraic Geometry 2010-05-24 v1

Abstract

We show that for a smooth hypersurface X\bbPnX\subset \bbP^n of degree at least 2, there exist arithmetically Cohen-Macaulay (ACM) codimension two subvarieties YXY\subset X which are not an intersection XSX\cap{S} for a codimension two subvariety S\bbPnS\subset\bbP^n. We also show there exist YXY\subset X as above for which the normal bundle sequence for the inclusion YX\bbPnY\subset X\subset\bbP^n does not split.

Keywords

Cite

@article{arxiv.1005.3990,
  title  = {On codimension two subvarieties in hypersurfaces},
  author = {N. Mohan Kumar and A. P. Rao and G. V. Ravindra},
  journal= {arXiv preprint arXiv:1005.3990},
  year   = {2010}
}

Comments

8 pages

R2 v1 2026-06-21T15:26:13.626Z